Document and Entity Information	12 Months Ended
Document and Entity Information	Dec. 31, 2014
Document Information [Line Items]
Document Type	20-F/A
Amendment Flag	false
Document Period End Date	Dec. 31, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	MOMO
Entity Registrant Name	Momo Inc.
Entity Central Index Key	0001610601
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Class A Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	280,869,740
Class B Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	96,886,370

Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets
Cash and cash equivalents	$ 450,968	$ 55,374
Accounts receivable, net of allowance for doubtful accounts of $nil and $nil as of December 31, 2013 and 2014, respectively	7,038	1,935
Amount due from a related party		198
Prepaid expenses and other current assets	8,009	1,204
Total current assets	466,015	58,711
Property and equipment, net	9,936	3,363
Rental deposits	793
Long term investments	1,760	951
Total assets	478,504	63,025
Current liabilities
Accounts payable (including accounts payable of the consolidated VIE without recourse to the Company of $125 and $3,728 as of December 31, 2013 and 2014, respectively)	5,900	344
Deferred revenue (including deferred revenue of the consolidated VIE without recourse to the Company of $3,714 and $16,348 as of December 31, 2013 and 2014, respectively)	16,348	3,714
Accrued expenses and other current liabilities (including accrued expenses and other current liabilities of the consolidated VIE without recourse to the Company of $684 and $1,100 as of December 31, 2013 and 2014, respectively)	9,415	1,508
Amount due to related parties (including amount due to related parties of the consolidated VIE without recourse to the Company of $nil and $nil as of December 31, 2013 and 2014, respectively)	6,450
Total current liabilities	38,113	5,566
Total liabilities	38,113	5,566
Commitments and contingencies (Note14)
Equity
Treasury stock	(64,494)
Additional paid-in capital	613,678	1,710
Subscription receivable		(15)
Accumulated deficit	(107,806)	(24,728)
Accumulated other comprehensive income (loss)	(1,027)	158
Total equity (deficit)	440,391	(22,860)
Total liabilities, mezzanine equity and equity	478,504	63,025
Series A-1 and Series A-2 Convertible Redeemable Participating Preferred Shares [Member]
Mezzanine equity
Convertible redeemable preferred stock value		2,218
Series A-3 Convertible Redeemable Participating Preferred Shares [Member]
Mezzanine equity
Convertible redeemable preferred stock value		4,774
Series B Convertible Redeemable Participating Preferred Shares [Member]
Mezzanine equity
Convertible redeemable preferred stock value		26,892
Series C Convertible Redeemable Participating Preferred Shares [Member]
Mezzanine equity
Convertible redeemable preferred stock value		46,435
Common Class Ordinary [Member]
Equity
Ordinary shares, value		15
Class A Common Stock [Member]
Equity
Ordinary shares, value	30
Class B Common Stock [Member]
Equity
Ordinary shares, value	$ 10

Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Allowance for doubtful accounts	$ 0	$ 0
Accounts payable of consolidated VIE without recourse	5,900	344
Deferred revenue of consolidated VIE without recourse	16,348	3,714
Accrued expenses and other current liabilities of consolidated VIE without recourse	9,415	1,508
Amount due to related parties of the consolidated VIE without recourse the Company	6,450
Ordinary shares, shares issued		147,000,000
Ordinary shares, shares outstanding		147,000,000
VIE "Beijing Momo" [Member]
Allowance for doubtful accounts	0	0
Accounts payable of consolidated VIE without recourse	3,728	125
Deferred revenue of consolidated VIE without recourse	16,348	3,714
Accrued expenses and other current liabilities of consolidated VIE without recourse	1,100	684
Amount due to related parties of the consolidated VIE without recourse the Company	0	0
Series A-1 and Series A-2 Convertible Redeemable Participating Preferred Shares [Member]
Convertible redeemable preferred shares, par value		$ 0.0001
Convertible redeemable preferred shares, shares authorized		38,480,677
Convertible redeemable preferred shares, shares issued		38,480,677
Convertible redeemable preferred shares, shares outstanding		38,480,677
Convertible redeemable preferred shares, liquidation value		4,260
Series A-3 Convertible Redeemable Participating Preferred Shares [Member]
Convertible redeemable preferred shares, par value		$ 0.0001
Convertible redeemable preferred shares, shares authorized		19,797,980
Convertible redeemable preferred shares, shares issued		19,797,980
Convertible redeemable preferred shares, shares outstanding		19,797,980
Convertible redeemable preferred shares, liquidation value		4,512
Series B Convertible Redeemable Participating Preferred Shares [Member]
Convertible redeemable preferred shares, par value		$ 0.0001
Convertible redeemable preferred shares, shares authorized		70,037,013
Convertible redeemable preferred shares, shares issued		70,037,013
Convertible redeemable preferred shares, shares outstanding		70,037,013
Convertible redeemable preferred shares, liquidation value		25,661
Series C Convertible Redeemable Participating Preferred Shares [Member]
Convertible redeemable preferred shares, par value		$ 0.0001
Convertible redeemable preferred shares, shares authorized		36,008,642
Convertible redeemable preferred shares, shares issued		36,008,642
Convertible redeemable preferred shares, shares outstanding		36,008,642
Convertible redeemable preferred shares, liquidation value		$ 59,240
Common Class Ordinary [Member]
Ordinary shares, par value		$ 0.0001
Ordinary shares, shares authorized		835,675,688
Ordinary shares, shares issued		147,000,000
Ordinary shares, shares outstanding		147,000,000
Class A Common Stock [Member]
Ordinary shares, par value	$ 0.0001
Ordinary shares, shares authorized	800,000,000
Ordinary shares, shares issued	280,869,740
Ordinary shares, shares outstanding	280,869,740
Class B Common Stock [Member]
Ordinary shares, par value	$ 0.0001
Ordinary shares, shares authorized	100,000,000
Ordinary shares, shares issued	96,886,370
Ordinary shares, shares outstanding	96,886,370

Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Net revenues	$ 44,755	$ 3,129
Cost and expenses:
Cost of revenues (including share-based compensation of $nil, $34 and $155 in 2012, 2013 and 2014, respectively)	(15,762)	(2,927)
Research and development (including share-based compensation of $39, $269 and $674 in 2012, 2013 and 2014, respectively)	(9,264)	(3,532)	(1,454)
Sales and marketing (including share-based compensation of $11, $128and $736 in 2012, 2013 and 2014, respectively)	(35,538)	(3,018)	(419)
General and administrative (including share-based compensation of $542, $532 and $5,073 in 2012, 2013 and 2014, respectively)	(10,354)	(3,010)	(1,969)
Total cost and expenses	(70,918)	(12,487)	(3,842)
Other operating income	26	0	0
Loss from operations	(26,137)	(9,358)	(3,842)
Interest income	722	32	3
Loss before income tax provision	(25,415)	(9,326)	(3,839)
Income tax expenses	0	0	0
Net loss attributable to Momo Inc.	(25,415)	(9,326)	(3,839)
Deemed dividend to preferred shareholders	(57,663)	(8,120)	(3,093)
Net loss attributable to ordinary shareholders	$ (83,078)	$ (17,446)	$ (6,932)
Net loss per share attributable to ordinary shareholders
Basic	$ (0.97)	$ (0.26)	$ (0.12)
Diluted	$ (0.97)	$ (0.26)	$ (0.12)
Weighted average shares used in calculating net loss per ordinary share
Basic	85,293,775	67,190,411	60,103,654
Diluted	85,293,775	67,190,411	60,103,654

Consolidated Statements of Operations (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based compensation	$ 6,638	$ 963	$ 592
Cost Of Revenues [Member]
Share-based compensation	155	34	0
Research And Development [Member]
Share-based compensation	674	269	39
Sales And Marketing [Member]
Share-based compensation	736	128	11
General And Administrative [Member]
Share-based compensation	$ 5,073	$ 532	$ 542

Consolidated Statements of Comprehensive Loss (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net loss attributable to Momo Inc.	$ (25,415)	$ (9,326)	$ (3,839)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(1,185)	181	(18)
Comprehensive loss attributable to Momo Inc.	$ (26,600)	$ (9,145)	$ (3,857)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References+ Details

Consolidated Statements of Changes in Equity (Deficit) (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Subscription Receivable [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2011	$ (200)	$ 15	$ 155		$ (15)	$ (350)	$ (5)
Balance, Shares at Dec. 31, 2011		147,000,000
Net loss	(3,839)					(3,839)
Share-based compensation	592		592
Deemed dividend to preferred shareholders	(3,093)					(3,093)
Foreign currency translation adjustment	(18)						(18)
Balance at Dec. 31, 2012	(6,558)	15	747		(15)	(7,282)	(23)
Balance, Shares at Dec. 31, 2012		147,000,000
Net loss	(9,326)					(9,326)
Share-based compensation	963		963
Deemed dividend to preferred shareholders	(8,120)					(8,120)
Foreign currency translation adjustment	181						181
Balance at Dec. 31, 2013	(22,860)	15	1,710		(15)	(24,728)	158
Balance, Shares at Dec. 31, 2013	147,000,000	147,000,000
Net loss	(25,415)					(25,415)
Share-based compensation	6,638		6,638
Repurchase of ordinary shares	(64,494)			(64,494)
Repurchase of ordinary shares, Shares		(15,651,589)
Issuance of ordinary shares upon Initial public offering ("IPO"), net of offering costs of $4,361	286,651	5	286,646
Issuance of ordinary shares upon Initial public offering ("IPO"), net of offering costs of $4,361, Shares		45,688,888
Conversion of participating convertible redeemable preferred shares to ordinary shares	318,704	20	318,684
Conversion of participating convertible redeemable preferred shares to ordinary shares, Shares		200,718,811
Deemed dividend to preferred shareholders	(57,663)					(57,663)
Subscription Receivable	15				15
Foreign currency translation adjustment	(1,185)						(1,185)
Balance at Dec. 31, 2014	$ 440,391	$ 40	$ 613,678	$ (64,494)		$ (107,806)	$ (1,027)
Balance, Shares at Dec. 31, 2014		377,756,110

Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities
Net loss	$ (25,415)	$ (9,326)	$ (3,839)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation	2,805	842	147
Share-based compensation	6,638	963	592
Loss on disposal of property and equipment	64
Changes in operating assets and liabilities
Accounts receivable	(5,205)	(1,906)
Prepaid expenses and other current assets	(7,489)	(846)	(304)
Amount due from a related party	198	(198)
Rental deposit	(797)
Accounts payable	4,494	338
Deferred revenue	12,825	3,657
Accrued expenses and other current liabilities	5,949	1,341	(700)
Net cash used in operating activities	(5,933)	(5,135)	(4,104)
Cash flows from investing activities
Purchase of property and equipment	(8,740)	(3,181)	(1,041)
Payment for long term investments	(809)		(951)
Net cash used in investing activities	(9,549)	(3,181)	(1,992)
Cash flows from financing activities
Proceeds from issuance of convertible redeemable participating preferred shares	211,750	45,000	23,551
Repurchase of convertible redeemable participating preferred shares	(30,750)
Proceeds from issuance of ordinary shares	291,012
Payment for IPO costs	(1,727)
Capital contribution from shareholders	15
Repurchase of ordinary shares	(58,044)
Net cash provided by financing activities	412,256	45,000	23,551
Effect of exchange rate on cash and cash equivalents	(1,180)	151	(34)
Net increase in cash and cash equivalents	395,594	36,835	17,421
Cash and cash equivalents at the beginning of year	55,374	18,539	1,118
Cash and cash equivalents at the end of year	450,968	55,374	18,539
Non-cash investing and financing activities
Payable for purchase of property and equipment	1,105
Payable for deferred IPO cost	2,634
Payable for repurchase of ordinary shares	$ 6,450

Organization and Principal Activities

12 Months Ended

Dec. 31, 2014

Text Block [Abstract]

Organization and Principal Activities

1.	ORGANIZATION AND PRINCIPAL ACTIVITIES

Momo Inc. (the “Company”, formerly known as Momo Technology Company Limited) is the holding company for a group of companies, which is incorporated in the British Virgin Islands (“BVI”) on November 23, 2011. In July 2014, the Company was redomiciled in the Cayman Islands as an exempted company registered under the laws of the Cayman Islands, and was renamed Momo Inc. The Company, its subsidiaries, its consolidated variable interest entity (“VIE”) and VIE’s subsidiary (collectively the “Group”) are principally engaged in providing mobile-based social networking services. The Group started its operation in July 2011. The Group started its monetization by introducing fee based membership subscription services and emoticons in the third quarter of 2013 as well as by offering the platform for mobile games in the fourth quarter of 2013.

As of December 31, 2014, details of the Company’s subsidiaries, VIE and VIE’s subsidiary are as follows:


			Percentage
	Date of	Place of	of economic
	incorporation	incorporation	ownership
Subsidiaries
Momo Technology HK Company Limited (“Momo HK”)	December 5, 2011	Hong Kong		100	%
Beijing Momo Information Technology Company Limited (“Beijing Momo IT”)	March 9, 2012	PRC		100	%
Momo Technology Overseas Holding Company Limited (“Momo BVI”)	March 5, 2014	BVI		100	%
Momo Information Technologies Corp. (“Momo US”)	March 7, 2014	US		100	%
VIE
Beijing Momo Technology Co., Ltd. (“Beijing Momo”)	July 7, 2011	PRC		N/A	*
VIE’s subsidiary
Chengdu Momo Technology Co., Ltd. (“Chengdu Momo”)	May 9, 2013	PRC		N/A	*

*	These entities are controlled by the Company pursuant to the contractual arrangements disclosed below.

The Company was established on November 23, 2011 with share capital of $15, which was 65% owned by Mr. Yan Tang, 20% owned by Mr. Yong Li, 8% owned by Mr. Xiaoliang Lei, and 7% owned by Mr. Zhiwei Li, (Yan Tang, Yong Li, Xiaoliang Lei and Zhiwei Li are collectively referred to “Founders”) as a vehicle for the group reorganization.

The Group commenced its business in China in July 2011 through Beijing Momo which has subsequently become the Group’s VIE through the contractual arrangements described below in “the VIE arrangements”.

Beijing Momo was established by Founders in Beijing, the People’s Republic of China (“PRC”), as a limited liability company on July 7, 2011, which was 65% owned by Mr. Yan Tang, 20% owned by Mr. Yong Li, 8% owned by Mr. Xiaoliang Lei, and 7% owned by Mr. Zhiwei Li. Beijing Momo and its subsidiary principally engaged in the provision of substantially all of the Group’s services in the PRC.

The Company owns 100% of the equity interests in Momo HK, an intermediate holding company incorporated in Hong Kong on December 5, 2011, which owns 100% of the equity interests in Beijing Momo IT, a wholly foreign-owned enterprise (“WFOE”), incorporated in the PRC by the Company on March 9, 2012.

The Company entered into group reorganization by way of entering into a series of contractual arrangements between its WFOE, VIE and the Company on April 18, 2012. Immediately after the reorganization, Founders controlled the Company, WFOE and Beijing Momo; therefore, the reorganization was accounted for as a transaction among entities under common control. Accordingly, the accompanying audited consolidated financial statements have been prepared by using historical cost basis and include the assets, liabilities, revenue, expenses and cash flows that were directly attributable to Beijing Momo for all periods presented.

In December, 2014, the Company completed its IPO and a concurrent private placement, upon which the Company’s ordinary shares were divided into Class A ordinary shares and Class B ordinary shares. Holders of Class A ordinary shares are entitled to one vote per share, while holders of Class B ordinary shares are entitled to ten votes per share. Each Class B ordinary share is convertible into one Class A ordinary share at any time by the holder thereof, while Class A ordinary shares are not convertible to Class B ordinary shares under any circumstances. The Company newly issued 45,688,888 Class A ordinary shares, consisting of (i) 36,800,000 Class A ordinary shares offered through IPO, and (ii) 8,888,888 Class A ordinary shares issued in connection with the concurrent private placement. All of the Company’s Series A, Series B, Series C and Series D preferred shares were automatically converted upon IPO into 200,718,811 Class A ordinary shares.

The VIE arrangements

PRC regulations currently limit direct foreign ownership of business entities providing value-added telecommunications services, advertising services and internet services in the PRC where certain licenses are required for the provision of such services. To comply with these PRC regulations, Beijing Momo IT and Beijing Momo’s shareholders entered into various contractual arrangements whereby the shareholders’ claim to the economic benefits of Beijing Momo and their ability to control the activities of Beijing Momo were transferred to Beijing Momo IT.

The Group provides substantially all of its services in China through Beijing Momo and its subsidiary, which hold the operating licenses and approvals to enable the Group to provide such mobile internet content services in the PRC. The equity interests of Beijing Momo are legally held by certain employees and shareholders of the Company (“Nominee Shareholders”).

The Company obtained control over Beijing Momo through Beijing Momo IT on April 18, 2012 by entering into a series of contractual arrangements between Beijing Momo IT, Beijing Momo and its Nominee Shareholders that enable the Company to (1) have power to direct the activities that most significantly affects the economic performance of the VIE, and (2) receive the economic benefits of the VIE that could be significant to the VIE. Accordingly, the Company is considered the primary beneficiary of the VIE and has consolidated the VIE’s financial results of operations, assets and liabilities in the Company’s consolidated financial statements. In making the conclusion that the Company is the primary beneficiary of the VIE, the Company’s rights under the Power of Attorney also provide the Company’s abilities to direct the activities that most significantly impact the VIE’s economic performance. The Company also believes that this ability to exercise control ensures that the VIE will continue to execute and renew the Exclusive Technology Consulting and Management Services Agreement and pay service fees to the Company. By charging service fees in whatever amounts the Company deems fit, and by ensuring that the Exclusive Technology Consulting and Management Services Agreement is executed and renewed indefinitely, the Company has the rights to receive substantially all of the economic benefits from the VIE.

To further strengthen the Company’s corporate structure, the Group amended its Power of Attorney, Exclusive Call Option Agreement and Equity Interest Pledge Agreement with the Nominee Shareholders and also entered into the Spousal Consent letters with the Nominee Shareholders in April 2014, and amended Exclusive Cooperation Agreements and Supplemental Agreements in August 2014. There was no substantial change to the term and condition of the VIE agreements and has no effect to the Company’s VIE consolidation.

The following is a summary of the contractual agreements that the Company, through Beijing Momo IT, entered into with Beijing Momo and its Nominee Shareholders, as amended and entered into on April 18, 2014 and August 31, 2014:

Agreements that provide the Company effective control over the VIE:

(1)

Power of Attorney

Pursuant to the Power of Attorney, the Nominee Shareholders of Beijing Momo each irrevocably appointed Beijing Momo IT as the attorney-in-fact to act on their behalf on all matters pertaining to Beijing Momo and to exercise all of their rights as a shareholder of Beijing Momo, including but not limited to convene, attend and vote on their behalf at shareholders’ meetings, designate and appoint directors and senior management members. Beijing Momo IT may authorize or assign its rights under this appointment to a person as approved by its board of directors at its sole discretion. Each power of attorney will remain in force until the shareholder ceases to hold any equity interest in Beijing Momo. The Company believes the Powers of Attorney can demonstrate the power of its PRC subsidiary (Beijing Momo IT) to direct how the VIE should conduct its daily operations.

(2)

Exclusive Call Option Agreement

Under the Exclusive Call Option Agreement among Beijing Momo IT, Beijing Momo and Nominee Shareholders of Beijing Momo, each of the Nominee Shareholders irrevocably granted Beijing Momo IT or its designated representative(s) an exclusive option to purchase, to the extent permitted under PRC law, all or part of his, her or its equity interests in Beijing Momo at the consideration equal to the nominal price or at lowest price as permitted by PRC laws.

Beijing Momo IT or its designated representative(s) have sole discretion as to when to exercise such options, either in part or in full. Without Beijing Momo IT’s written consent, the Nominee Shareholders of Beijing Momo shall not transfer, donate, pledge, or otherwise dispose any equity interests of Beijing Momo in any way. In addition, any consideration paid by Beijing Momo IT to the Nominee Shareholders of Beijing Momo in exercising the option shall be transferred back to Beijing Momo IT or its designated representative(s). This agreement could be terminated when all the shareholders’ equity were acquired by WFOE or its designated representative(s) subject to the law of People’s Republic of China.

In addition, Beijing Momo irrevocably granted Beijing Momo IT an exclusive and irrevocable option to purchase any or all of the assets owned by Beijing Momo at the lowest price permitted under PRC law. Without Beijing Momo IT’s prior written consent, Beijing Momo and its Nominee Shareholders will not sell, transfer, mortgage or otherwise dispose of Beijing Momo’s material assets, legal or beneficial interests or revenues of more than RMB500,000 or allow an encumbrance on any interest in Beijing Momo.

(3)

Spousal Consent Letters

On April 18, 2014, each spouse of the married Nominee Shareholders of Beijing Momo entered into a Spousal Consent Letter, which unconditionally and irrevocably agreed that the equity interests in Beijing Momo held by and registered in the name of their spouse will be disposed of pursuant to the Equity Interest Pledge Agreement, the Exclusive Call Option Agreement, and the Power of Attorney. Each spouse agreed not to assert any rights over the equity interests in Beijing Momo held by their spouse. In addition, in the event that the spouse obtains any equity interests in Beijing Momo held by their spouse for any reason, they agreed to be bound by the contractual arrangements.

Agreements that transfer economic benefits to the Company:

(1)

Exclusive Cooperation Agreements and Supplemental Agreements

In August 2014, Beijing Momo IT entered into an Exclusive Cooperation Agreements and a Supplemental Agreement with Beijing Momo and Chengdu Momo, respectively, to supersede the Exclusive Technology Consulting and Management Services Agreements signed in April 2012 by Beijing Momo IT and Beijing Momo. Pursuant to the amended agreements, Beijing Momo IT has the exclusive right to provide, among other things, licenses, copyrights, technical and non-technical services to Beijing Momo and Chengdu Momo and receive service fees and license fees as consideration. Beijing Momo and Chengdu Momo will maintain a pre-determined level of operating profit and remit the excess operating profit, if any, to Beijing Momo IT as the consideration of the licenses, copyrights, technical and non-technical services provided by Beijing Momo IT. The agreements will remain effective for 10 years. At the sole discretion of Beijing Momo IT, the agreements could be renewed on applicable expirations dates, or Beijing Momo IT, Beijing Momo and Chengdu Momo could enter into other exclusive agreements.

For the years ended December 31, 2012, 2013 and 2014, Beijing Momo IT charged Beijing Momo and Chengdu Momo a service fee of $nil, $3,356 and $35,188 at WFOE’s discretion, respectively.

Since Beijing Momo IT has effectively controlled Beijing Momo through Power of Attorney, Equity Interest Pledge Agreement and Exclusive Call Option Agreement, Beijing Momo IT has the right to adjust the service fees at its sole discretion. The agreement shall remain effective in ten years. At the discretion of Beijing Momo IT, this agreement could be renewed on applicable expiration dates, or Beijing Momo IT and Beijing Momo could enter into another exclusive agreement.

(2)

Equity Interest Pledge Agreement

Under the equity interest pledge agreement among Beijing Momo IT and each of the Nominee Shareholders of Beijing Momo, the Nominee Shareholders pledged all of their equity interests in Beijing Momo to Beijing Momo IT to guarantee Beijing Momo’s and its shareholders’ payment obligations arising from the Exclusive Technology Consulting and Management Service Agreement, Business Operation Agreement and Exclusive Call Option Agreement, including but not limited to, the payments due to Beijing Momo IT for services provided.

If Beijing Momo or any of its Nominee Shareholders breaches its contractual obligations under the above agreements, Beijing Momo IT, as the pledgee, will be entitled to certain rights and entitlements, including receiving priority proceeds from the auction or sale of whole or part of the pledged equity interests of Beijing Momo in accordance with PRC legal procedures. During the term of the pledge, the shareholders of Beijing Momo shall cause Beijing Momo not to distribute any dividends and if they receive any dividends generated by the pledged equity interests, they shall transfer such received amounts to an account designated by Beijing Momo IT according to the instruction of Beijing Momo IT.

The pledge will remain binding until Beijing Momo and its Nominee Shareholders has fully performed all their obligations under the Exclusive Cooperation Agreements and Supplemental Agreements, Business Operations Agreement and Exclusive Call Option Agreement.

(3)

Business Operations Agreement

Under the Business Operations Agreement among Beijing Momo IT, Beijing Momo and the Nominee Shareholders of Beijing Momo, without the prior written consent of Beijing Momo IT or its designated representative(s), Beijing Momo shall not conduct any transaction that may substantially affect the assets, business, operation or interest of Beijing Momo IT. Beijing Momo and Nominee Shareholders shall also follow Beijing Momo IT’s instructions on management of Beijing Momo’s daily operation, finance and employee matters and appoint the nominee(s) designated by Beijing Momo IT as the director(s) and senior management members of Beijing Momo. In the event that any agreements between Beijing Momo IT and Beijing Momo terminates, Beijing Momo IT has the sole discretion to determine whether to continue any other agreements with Beijing Momo. Beijing Momo IT is entitled to any dividends or other interests declared by Beijing Momo and the shareholders of Beijing Momo have agreed to promptly transfer such dividends or other interests to Beijing Momo IT. The agreement shall remain effective in 10 years. At the discretion of Beijing Momo IT, this agreement will be renewed on applicable expiration dates, or Beijing Momo IT and Beijing Momo will enter into another exclusive agreement.

Through these contractual agreements, the Company has the ability to effectively control the VIE and is also able to receive substantially all the economic benefits of the VIE.

Risk in relation to the VIE structure

The Company believes that Beijing Momo IT and Beijing Momo’s contractual arrangements with the VIE are in compliance with PRC law and are legally enforceable. Certain shareholders of Beijing Momo are also shareholders of the Company and therefore have no current interest in seeking to act contrary to the contractual arrangements. However, uncertainties in the PRC legal system could limit the Company’s ability to enforce these contractual arrangements and if the shareholders of the VIE were to reduce their interest in the Company, their interests may diverge from that of the Company and that may potentially increase the risk that they would seek to act contrary to the contractual terms, for example by influencing the VIE not to pay the service fees when required to do so.

However, the Company cannot assure that when conflicts of interest arise, the shareholders will act in the best interests of the Company or that conflicts of interests will be resolved in the Company’s favor. Currently, the Company does not have existing arrangements to address potential conflicts of interest the shareholders of the VIE may encounter in their capacity as the beneficial owners and director of the VIE on the one hand, and as beneficial owners and directors or officer of the Company, on the other hand. The Company believes the shareholders of the VIE will not act contrary to any of the contractual arrangements and the Exclusive Call Option Agreement provides the Company with a mechanism to remove the shareholders as the beneficial shareholders of the VIE should they act to the detriment of the Company. The Company relies on the VIE’s shareholders, as directors and officer of the Company, to fulfill their fiduciary duties and abide by laws of the PRC and the BVI and act in the best interest of the Company. If the Company cannot resolve any conflicts of interest or disputes between the Company and the VIE’s shareholders, the Company would have to rely on legal proceedings, which could result in disruption of its business, and there is substantial uncertainty as to the outcome of any such legal proceedings.

The Company’s ability to control the VIE also depends on the Power of Attorney. Beijing Momo IT and Beijing Momo have to vote on all matters requiring shareholder approval in the VIE. As noted above, the Company believes this power of attorney is legally enforceable but may not be as effective as direct equity ownership.

In addition, if the legal structure and contractual arrangements were found to be in violation of any existing PRC laws and regulations, the PRC government could:

•

revoke the Group’s business and operating licenses;

•

require the Group to discontinue or restrict operations;

•

restrict the Group’s right to collect revenues;

•

block the Group’s websites;

•

require the Group to restructure the operations in such a way as to compel the Group to establish a new enterprise, re-apply for the necessary licenses or relocate our businesses, staff and assets;

•

impose additional conditions or requirements with which the Group may not be able to comply; or

•

take other regulatory or enforcement actions against the Group that could be harmful to the Group’s business.

The imposition of any of these penalties may result in a material and adverse effect on the Group’s ability to conduct the Group’s business. In addition, if the imposition of any of these penalties causes the Group to lose the rights to direct the activities of the VIE or the right to receive their economic benefits, the Group would no longer be able to consolidate the VIE. The Group does not believe that any penalties imposed or actions taken by the PRC government would result in the liquidation of the Company, Beijing Momo IT, or the VIE.

The following financial statements amounts and balances of the VIE were included in the accompanying consolidated financial statements after the elimination of intercompany balances and transactions as of and for the years ended December 31:


	As of December 31,
	2013		2014
Cash and cash equivalents	$	861	$	9,867
Accounts receivable, net of allowance for doubtful accounts of $nil and $nil as of December 31, 2013 and 2014, respectively		1,935		7,038
Prepaid expenses and other current assets		435		5,306

Total current assets		3,231		22,211

Property and equipment, net		1,189		1,318
Rental deposits		—		312
Long term investments		—		809

Total assets		4,420		24,650

Accounts payable		125		3,728
Deferred revenue		3,714		16,348
Accrued expenses and other current liabilities		684		1,100

Total current liabilities		4,523		21,176

Total liabilities	$	4,523	$	21,176


	For the years ended December 31,
	2012			2013			2014
Net revenues	$	—		$	3,129		$	44,755
Net (loss) profit	$	(2,292	)	$	(2,179	)	$	32,945


	For the years ended December 31,
	2012			2013			2014
Net cash (used in) provided by operating activities	$	(3,005	)	$	(2,956	)	$	40,383
Net cash used in investing activities	$	(1,039	)	$	(723	)	$	(1,921	)
Net cash used in financing activities	$	—		$	—		$	—

The unrecognized revenue-producing assets that are held by the VIE are primarily self-developed intangible assets such as domain names, trademark and various licenses which are un-recognized at consolidated balance sheets.

The VIE contributed an aggregate of nil, 100% and 100% of the consolidated net revenues for the years ended December 31, 2012, 2013 and 2014, respectively. As of the fiscal years ended December 31, 2013 and 2014, the VIE accounted for an aggregate of 7.0% and 5.2%, respectively, of the consolidated total assets, and 81.3% and 55.6%, respectively, of the consolidated total liabilities. The assets that were not associated with the VIE primarily consist of cash and cash equivalents.

There are no consolidated VIE’s assets that are collateral for the VIE’s obligations and can only be used to settle the VIE’s obligations. There are no creditors (or beneficial interest holders) of the VIE that have recourse to the general credit of the Company or any of its consolidated subsidiaries. There are no terms in any arrangements, considering both explicit arrangements and implicit variable interests, that require the Company or its subsidiaries to provide financial support to the VIE. However, if the VIE ever needs financial support, the Company or its subsidiaries may, at its option and subject to statutory limits and restrictions, provide financial support to its VIE through loans to the shareholders of the VIE or entrustment loans to the VIE. Relevant PRC laws and regulations restrict the VIE from transferring a portion of its net assets, equivalent to the balance of its statutory reserve and its share capital, to the Company in the form of loans and advances or cash dividends. Please refer to Note 18 for disclosure of restricted net assets. The Group may lose the ability to use and enjoy assets held by VIE that are important to the operation of business if VIE declare bankruptcy or becomes subject to a dissolution or liquidation proceeding.

Significant Accounting Policies

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Significant Accounting Policies

2.	SIGNIFICANT ACCOUNTING POLICIES

Basis of presentation

The consolidated financial statements of the Group have been prepared in accordance with the accounting principles generally accepted in the United States of America (“U.S. GAAP”).

Basis of consolidation

The consolidated financial statements of the Group include the financial statements of Momo Inc., its subsidiaries, its VIE and VIE’s subsidiary. All inter-company transactions and balances have been eliminated upon consolidation.

Use of estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and revenues, cost and expenses in the financial statements and accompanying notes. Significant accounting estimates reflected in the Group’s consolidated financial statements include revenue recognition, the useful lives and impairment of property and equipment, valuation allowance for deferred tax assets, share-based compensation and fair value of the ordinary shares and convertible redeemable participating preferred shares.

Cash and cash equivalents

Cash and cash equivalents consist of cash on hand and highly liquid investments, which are unrestricted from withdrawal or use, or which have original maturities of three months or less when purchased.

Accounts receivable

Accounts receivable primarily represents the cash due from third-party payment channels, net of allowance for doubtful accounts. The Group makes estimates for the allowance for doubtful accounts based upon its assessment of various factors, including the age of accounts receivable balances, credit quality of third party payment channels, current economic conditions and other factors that may affect their ability to pay. No allowance for doubtful accounts as of December 31, 2013 and 2014, respectively, was provided as there was no risk of collecting this account receivable.

Financial instruments

Financial instruments of the Group primarily consist of cash and cash equivalents, accounts receivable, accounts payable, cost method investments, deferred revenue and amount due from a related party.

The carrying values of cash, and cash equivalents, accounts receivable, accounts payable, deferred revenue and amount due from a related party approximate their fair values due to short-term maturities. It is not practical to estimate the fair value of the Group’s cost method investment because of the lack of quoted market price and the inability to estimate fair value without incurring excessive costs.

Foreign currency risk

The Renminbi (“RMB”) is not a freely convertible currency. The State Administration for Foreign Exchange, under the authority of the People’s Bank of China, controls the conversion of RMB into foreign currencies. The value of the RMB is subject to changes in central government policies and to international economic and political developments affecting supply and demand in the China Foreign Exchange Trading System market. Cash and cash equivalents of the Group included aggregate amounts of $3,723 and $20,181 as of December 31, 2013 and 2014, respectively, which were denominated in RMB.

Concentration of credit risk

Financial instruments that potentially expose the Group to concentration of credit risk consist primarily of cash and cash equivalents, and accounts receivable. The Group places their cash with financial institutions with high-credit ratings and quality.

Third-party payment channels accounting for 10% or more of accounts receivables are as follows:


	December 31,
	2013			2014
A		69	%		8	%
B		24	%		34	%
C		6	%		26	%

No user accounted for 10% or more of accounts receivables for the years ended December 31, 2013 and 2014, respectively.

Concentration of revenue

The following table summarizes sales generated from games that individually accounting for 10% or more of net revenues:


	For the years ended December 31,
	2012		2013		2014
Game D		—		—		14	%

No user accounted for 10% or more of net revenues for the years ended December 31, 2012, 2013 and 2014, respectively.

Cost method investment

For investments in an investee over which the Company does not have significant influence, the Company carries the investment at cost and recognizes income as any dividends declared from distribution of investee’s earnings. The Company reviews the cost method investments for impairment whenever events or changes in circumstances indicate that the carrying value may no longer be recoverable. An impairment loss is recognized in earnings equal to the difference between the investment’s cost and its fair value at the balance sheet date of the reporting period for which the assessment is made. The fair value of the investment would then become the new cost basis of the investment.

Equity method investment

The investee company over which the Group has the ability to exercise significant influence, but does not have a controlling interest are accounted for using the equity method. Significant influence is generally considered to exist when the Group has an ownership interest in the voting stock of the investee between 20% and 50%, and other factors, such as representation in the investee’s Board of Directors, voting rights and the impact of commercial arrangements, are considered in determining whether the equity method of accounting is appropriate.

Investee companies in which the Group has equity interest over 50%, but the noncontrolling shareholders have substantive rights to participate in significant operating and financing decisions are accounted for using the equity method.

Under the equity method of accounting, the affiliated company’s accounts are not reflected within the Group’s consolidated balance sheets and statements of operations; however, the Group’s share of the earnings or losses of the affiliated company is reflected in the caption “loss from equity method investment” in the consolidated statements of operations. An impairment charge is recorded if the carrying amount of the investment exceeds its fair value and this condition is determined to be other-than temporary.

Property and equipment, net

Property and equipment are stated at cost less accumulated depreciation. Depreciation is calculated on a straight-line basis over the following estimated useful lives:


Office equipment			3-5 years
Computer equipment			3 years
Vehicles			5 years
Leasehold improvement			Shorter of the lease term or
			estimated useful lives

Impairment of long-lived assets

The Group reviews its long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may no longer be recoverable. When these events occur, the Group measures impairment by comparing the carrying value of the long-lived assets to the estimated undiscounted future cash flows expected to result from the use of the assets and their eventual disposition. If the sum of the expected undiscounted cash flow is less than the carrying amount of the assets, the Group would recognize an impairment loss based on the fair value of the assets.

Fair value

Fair value is the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities required or permitted to be recorded at fair value, the Group considers the principal or most advantageous market in which it would transact and it considers assumptions that market participants would use when pricing the asset or liability.

Authoritative literature provides a fair value hierarchy that requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. An asset or liability categorization within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement as follows:

Level 1

Level 1 applies to assets or liabilities for which there are quoted prices in active markets for identical assets or liabilities.

Level 2

Level 2 applies to assets or liabilities for which there are inputs other than quoted prices included within Level 1 that are observable for the assets or liabilities such as quoted prices for similar assets or liabilities in active markets; quoted prices for identical assets or liabilities in markets with insufficient volume or infrequent transactions (less active markets); or model-derived valuations in which significant inputs are observable or can be derived principally from, or corroborated by, observable market data.

Level 3

Level 3 applies to assets or liabilities for which there are unobservable inputs to the valuation methodology that are significant to the measurement of the fair value of the assets or liabilities.

Revenue recognition

The Group recognizes revenue when persuasive evidence of an arrangement exists, delivery has occurred, the sales price is fixed or determinable, and collectability is reasonably assured. The Group principally derives its revenue from membership subscription services, offering the platform for mobile games developed by third parties and other services, including the use of the paid emoticons and mobile marketing services.

(a)

Membership subscription

Membership subscription is a service package which enables members to enjoy additional functions and privileges. The contract period for the membership subscription ranges from one month to one year. All membership subscription is nonrefundable. The Group collects membership subscription in advance and records it as deferred revenue. Revenue is recognized ratably over the contract period for the membership subscription services.

Net revenues of $nil, $2,808 and $29,756 were recognized for membership subscription for the years ended December 31, 2012, 2013 and 2014, respectively.

(b)

Mobile games

The Group provides game services and generates revenue from offering the platform for mobile games developed by third-party game developers. All of the games are developed by third-party game developers and can be accessed and played by game players directly through the Group’s mobile game platform. The Group primarily views the game developers to be its customers and considers its responsibility under its agreements with the game developers to be promotion of the game developers’ games. The Group generally collects payments from game players in connection with the sale of ingame currencies and remits certain agreed-upon percentages of the proceeds to the game developers and records revenue net of remittances. Revenue from the sale of in-game currencies is primarily recorded net of remittances to game developers. Purchases of in-game currencies are not refundable after they have been sold unless there is unused in-game currencies at the time a game is discontinued. Typically, a game will only be discontinued when the monthly revenue generated by a game becomes consistently insignificant. The Group does not currently expect to pay any material cash refunds to game players or game developers in connection with a discontinued game.

Non-exclusive mobile games services

The Group enters into non-exclusive agreements with the game developers and offers the Group’s mobile game platform for the mobile games developed by the game developers. The Group has determined that it has no additional performance obligation to the developers or game players upon players’ completion of the corresponding in-game purchase. Therefore, revenues from the sale of in-game currencies are primarily recorded net of remittances to game developers and deferred until the estimated consumption date by individual game (i.e., the estimated date in-game currencies are consumed within the game), which is typically within a short period of time ranging from one to six days after purchase of the in-game currencies.

Exclusive mobile games services

The Group enters into an exclusive agreement with the game developer and provides the Group’s mobile game platform for such mobile game developed by the game developer. Under this exclusive agreement, the players can access to the game only through the Group’s platform. The Group has determined that it is obligated to provide mobile games services to game players who purchased virtual items to gain an enhanced game-playing experience over an average period of player relationship. Hence, the Group believes that its performance for, and obligation to, the game developers correspond to the game developers’ services to the players. The Group does not have access to the data on the consumption details and the types of virtual items purchased by the game players. Therefore, the Group cannot estimate the economic life of the virtual item. However, the Group maintains data of when a particular player purchases the virtual items and logs into the game. The Group has adopted a policy to recognize revenues net of remittances to game developers over the estimated period of player relationship on a game-by-game basis. As of December 31, 2014, the Company operated three games under exclusive arrangements and the estimated periods of the player relationship is in a range of 45 to 69 days.

Net revenues of $nil, $92 and $11,237 were recognized for mobile games for the years ended December 31, 2012, 2013 and 2014, respectively.

(c)

Paid emoticons

All paid emoticons are durable with indefinite lives and each of them is effective upon purchase payment made by a user and completely download. The price of each emoticon is fixed and identifiable. The revenue is recognized ratably over the estimated usage life of the emoticon (i.e. 180 days) by the user from the date of the emoticon is downloaded.

The Group reassesses the estimated lives periodically. If there are indications of any significant changes to their estimated lives, the revised estimates will be applied prospectively in the period of change to all existing emoticons which are not totally amortized.

Net revenues of $nil, $217 and $1,787 were recognized for the use of emoticons on its platform for the years ended December 31, 2012, 2013 and 2014, respectively.

Advertising barter transactions

The Group engages in barter transactions where it trades advertising resources with certain third parties for other advertising resources. The Group recognizes revenues and expenses at fair value only if the fair value of the services exchanged in the transaction is determinable based on the Group’s own historical practice of receiving cash or other consideration that is readily convertible to a known amount of cash for similar advertising resources from customers unrelated to the party in the barter transaction. In the year ended December 31, 2014, the Group engaged in one advertising barter transaction with an independent counterparty, for which the Group shall display the counterparty’s brand or product promotion information on its own platform in exchange for advertising to be displayed on the counterparty’s advertising media. The fair value of this transaction was not determinable due to the lack of the Group’s similar historical practice. Therefore, the advertising barter transaction shall be recorded based on the carrying amount of the advertising surrendered, which is the estimated cost to be incurred. As of December 31, 2014, the Group has not provided the services to the counterparty but has received the advertising services provided by the counterparty. However, the Group didn’t record any expenses or deferred revenue because the estimated cost to be incurred is insignificant.

Deferred revenue

Deferred revenue primarily includes cash received in advance from users. The unused cash balances remaining in users’ accounts are recorded as a liability. Deferred revenue related to prepayments from users will be recognized as revenue when all of the revenue recognition criteria are met.

Cost of revenues

Cost of revenues consist of expenditures incurred in the generation of the Group’s revenues, includes but not limited to salaries and benefits paid to employee, commission fee paid to third-party service providers, bandwidth costs, short messaging service charges, and depreciation. These costs are expensed as incurred except for the direct and incremental platform commission fees to third-party are deferred in “Prepaid expenses and other current assets” on the consolidated balance sheets. The deferred platform commissions are recognized in the consolidated statements of operations in “Cost of revenues” in the period in which the related revenues are recognized.

Government subsidies

The Group records such government subsidies as a liability when it is received and records it as other operating income when there is no further performance obligation.

The Group received government subsidies $nil, $330 and $nil in relation to a government sponsored project on development and research of games for the years ended December 31, 2012, 2013 and 2014, respectively, and recorded $nil, $nil and $nil government subsidies as other operating income for the years ended December 31, 2012, 2013 and 2014, respectively.

Research and development expenses

Research and development expenses primarily consist of (i) salaries and benefits for research and development personnel, and (ii) office rental, general expenses and depreciation expenses associated with the research and development activities. The Group’s research and development activities primarily consist of the research and development of new features for its mobile platform and its self-developed mobile games. The Company has expensed all research and development expenses when incurred.

Value added taxes

On January 1, 2012, the PRC Ministry of Finance and the State Administration of Taxation officially launched a pilot value-added tax (“VAT”) reform program (“Pilot Program”), applicable to businesses in selected industries. Businesses in the Pilot Program would pay VAT instead of business tax. The Pilot Program initially applied only to transportation industry and “modern service industries” (“Pilot Industries”) in Shanghai and subsequently was expanded to ten other provinces and municipalities between August and December 2012. Since September 1, 2012, certain revenue generated from providing services which were previously subject to business tax became subject to VAT and related surcharges by various Chinese local tax authorities at rate of 6.72%. Entities that are VAT general taxpayers are allowed to offset qualified input VAT paid to suppliers against their output VAT liabilities. Net VAT balance between input VAT and output VAT is recorded in the line item of accrued expenses and other current liabilities on the consolidated balance sheets. VAT is also reported as a deduction to revenue when incurred and amounted to $nil, $392, and $5,436 for the years ended December 31, 2012, 2013 and 2014, respectively.

Income taxes

Current income taxes are provided for in accordance with the laws of the relevant tax authorities. Deferred income taxes are recognized when temporary differences exist between the tax bases of assets and liabilities and their reported amounts in the consolidated financial statements. Net operating loss carry forwards and credits are applied using enacted statutory tax rates applicable to future years. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more-likely-than-not that a portion of or all of the deferred tax assets will not be realized. The components of the deferred tax assets and liabilities are individually classified as current and non-current based on their characteristics.

The impact of an uncertain income tax position on the income tax return is recognized at the largest amount that is more-likely-than-not to be sustained upon audit by the relevant tax authority. An uncertain income tax position will not be recognized if it has less than a 50% likelihood of being sustained. Interest and penalties on income taxes will be classified as a component of the provisions for income taxes. The Group did not recognize any income tax due to uncertain tax position or incur any interest and penalties related to potential underpaid income tax expenses for the years ended December 31, 2012, 2013 and 2014, respectively.

Foreign currency translation

The functional and reporting currency of the Company is the United States dollar (“U.S. dollar”). The financial records of the Group’s subsidiaries and VIE located in the PRC are maintained in their local currencies, the RMB, which are also the functional currencies of these entities.

Monetary assets and liabilities denominated in currencies other than the functional currency are translated into the functional currency at the rates of exchange ruling at the balance sheet date. Transactions in currencies other than the functional currency during the year are converted into functional currency at the applicable rates of exchange prevailing when the transactions occurred. Transaction gains and losses are recognized in the statement of operations.

The Group’s entities with functional currency of RMB, translate their operating results and financial positions into the U.S. dollar, the Group’s reporting currency. Assets and liabilities are translated using the exchange rates in effect on the balance sheet date. Revenues, expenses, gains and losses are translated using the average rate for the year. Translation adjustments are report as cumulative translation adjustments and are shown as a separate component of comprehensive loss.

Operating leases

Leases where the rewards and risks of ownership of assets primarily remain with the lessor are accounted for as operating leases. Payments made under operating leases are charged to the consolidated statements of operations on a straight-line basis over the lease periods.

Advertising expenses

The Group expenses advertising expenses as incurred. Total advertising expenses incurred were $139, $1,162 and $27,408 for the years ended December 31, 2012, 2013 and 2014, respectively, and have been included in sales and marketing expenses in the consolidated statements of operations.

Comprehensive loss

Comprehensive loss includes net loss and foreign currency translation adjustments. Comprehensive loss is reported in the consolidated statements of comprehensive loss.

Share-based compensation

Share-based payment transactions with employees are measured based on the grant date fair value of the equity instrument issued and recognized as compensation expense net of a forfeiture rate on a straight-line basis, over the requisite service period, with a corresponding impact reflected in additional paid-in capital.

Share awards issued to nonemployees are measured at fair value at the earlier of the commitment date or the date the services is completed and recognized over the period the service is provided.

The estimate of forfeiture rate will be adjusted over the requisite service period to the extent that actual forfeiture rate differs, or is expected to differ, from such estimates. Changes in estimated forfeiture rate will be recognized through a cumulative catch-up adjustment in the period of change.

Earnings (loss) per share

Basic loss per ordinary share is computed by dividing net loss attributable to ordinary shareholders by the weighted average number of ordinary shares outstanding during the period.

The Group’s convertible redeemable participating preferred shares are participating securities as they participate in undistributed earnings on an as-if-converted basis. The Group determined that the nonvested restricted shares are participating securities as the holders of the nonvested restricted shares have a nonforfeitable right to receive dividends with all ordinary shares but the nonvested restricted shares do not have a contractual obligation to fund or otherwise absorb the Company’s losses. Accordingly, the Group uses the two-class method whereby undistributed net income is allocated on a pro rata basis to the ordinary shares, preferred shares and nonvested restricted shares to the extent that each class may share in income for the period; whereas the undistributed net loss for the period is allocated to ordinary shares only because the convertible redeemable participating preferred shares and nonvested restricted shares are not contractually obligated to share the loss.

Diluted loss per ordinary share reflects the potential dilution that could occur if securities were exercised or converted into ordinary shares. The Group had convertible redeemable participating preferred shares, and stock options, which could potentially dilute basic loss per share in the future. To calculate the number of shares for diluted loss per ordinary share, the effect of the convertible redeemable participating preferred shares is computed using the as-if-converted method; the effect of the stock options is computed using the treasury stock method.

Recent accounting pronouncements adopted

In July 2013, the FASB issued a pronouncement which provides guidance on financial statement presentation of an unrecognized tax benefits when a net operating loss carry forward, a similar tax loss, or a tax credit carry forward exists. The FASB’s objective in issuing this Accounting Standards Update (“ASU”) is to eliminate diversity in practice resulting from a lack of guidance on this topic in current U.S. GAAP.

The amendments in this ASU state that an unrecognized tax benefit, or a portion of an unrecognized tax benefit, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carry forward, a similar tax loss, or a tax credit carry forward, except as follows. To the extent a net operating loss carry forward, a similar tax loss, or a tax credit carry forward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets.

This ASU applies to all entities that have unrecognized tax benefits when a net operating loss carry forward, a similar tax loss, or a tax credit carry forward exists at the reporting date. The amendments in this ASU are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. Early adoption is permitted. The amendments should be applied prospectively to all unrecognized tax benefits that exist at the effective date. Retrospective application is permitted. The adoption of this guidance did not have a significant effect on the Group’s consolidated financial statements.

Recent accounting pronouncements not yet adopted

In May 2014, the FASB issued, ASU 2014-09, “Revenue from Contracts with Customers (Topic 606)”. The guidance substantially converges final standards on revenue recognition between the FASB and the International Accounting Standards Board providing a framework on addressing revenue recognition issues and, upon its effective date, replaces almost all exiting revenue recognition guidance, including industry-specific guidance, in current U.S. generally accepted accounting principles.

The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve that core principle, an entity should apply the following steps:

•

Step 1: Identify the contract(s) with a customer.

•

Step 2: Identify the performance obligations in the contract.

•

Step 3: Determine the transaction price.

•

Step 4: Allocate the transaction price to the performance obligations in the contract.

•

Step 5: Recognize revenue when (or as) the entity satisfies a performance obligation.

For a public entity, the amendments in this ASU are effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Early application is not permitted.

An entity should apply the amendments in this ASU using one of the following two methods:

Retrospectively to each prior reporting period presented and the entity may elect any of the following practical expedients:

•

For completed contracts, an entity need not restate contracts that begin and end within the same annual reporting period.

•

For completed contracts that have variable consideration, an entity may use the transaction price at the date the contract was completed rather than estimating variable consideration amounts in the comparative reporting periods.

•

For all reporting periods presented before the date of initial application, an entity need not disclose the amount of the transaction price allocated to remaining performance obligations and an explanation of when the entity expects to recognize that amount as revenue.

Retrospectively with the cumulative effect of initially applying this ASU recognized at the date of initial application. If an entity elects this transition method it also should provide the additional disclosures in reporting periods that include the date of initial application of:

•

The amount by which each financial statement line item is affected in the current reporting period by the application of this ASU as compared to the guidance that was in effect before the change.

•

An explanation of the reasons for significant changes.

The Group is in the process of evaluating the impact of adoption of this guidance on the Group’s consolidated financial statements.

In August 2014, the FASB issued a new pronouncement which provides guidance on determining when and how reporting entities must disclose going-concern uncertainties in their financial statements. The new standard requires management to perform interim and annual assessments of an entity’s ability to continue as a going concern within one year of the date of issuance of the entity’s financial statements. Further, an entity must provide certain disclosures if there is “substantial doubt about the entity’s ability to continue as a going concern.” The new standard is effective for fiscal years ending after December 15, 2016. The Group does not expect the adoption of this guidance will have a significant effect on the Group’s consolidated financial statements.

- Definition

The entire disclosure for all significant accounting policies of the reporting entity.

+ References+ Details

Accounts Receivable, Net

12 Months Ended

Dec. 31, 2014

Receivables [Abstract]

Accounts Receivable, Net

3.	ACCOUNTS RECEIVABLE, NET

Accounts receivable, net consisted of the following:


	As of December 31,
	2013		2014
Accounts receivable	$	1,935	$	7,038
Less: allowance for doubtful accounts		—		—

Accounts receivable, net	$	1,935	$	7,038

- Definition

The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses.

+ References+ Details

Prepaid Expenses and Other Current Assets

12 Months Ended

Dec. 31, 2014

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Prepaid Expenses and Other Current Assets

4.	PREPAID EXPENSES AND OTHER CURRENT ASSETS

Prepaid expenses and other current assets consisted of the following:


	As of December 31,
	2013		2014
Advance to game developers	$	77	$	2,894
VAT input (note 1)		281		2,173
Deferred platform commission cost		315		1,878
Prepaid expenses		—		416
Interest receivable		—		368
Prepaid rental expenses		114		35
Advance to advertisement suppliers		58		3
Rental deposit		308		2
Others		51		240

	$	1,204	$	8,009

Note 1:

VAT input mainly occurred from the purchasing of property and equipment and advertising activities.

Long Term Investments

12 Months Ended

Dec. 31, 2014

Investments Schedule [Abstract]

Long Term Investments

5.	LONG TERM INVESTMENTS


	As of December 31,
	2013		2014
Equity method investment
Shanghai Touch Future Network Technology Co., Ltd	$	—	$	483
Cost method investments
Shanghai Shuanglang Technology Co., Ltd		—		326
Smartisan Technology Co., Ltd.		951		951

	$	951	$	1,760

On April 27, 2013, the Group acquired 12% equity interest of Smartisan Technology Co., Ltd. for long term investment at total cash consideration of $951 and accounted for the investment using cost method as the Company was unable to exercise significant influence on the investee.

On July 25, 2014, the Group invested a total cash consideration of $326 to Shanghai Shuanglang Technology Co., Ltd for its 10% equity interest and accounted for the investment using cost method as the Company was unable to exercise significant influence on the investee.

On December 3, 2014, the Group invested a total cash consideration of $483 to Shanghai Touch Future Network Technology Co., Ltd. for its 20% equity interest and accounted for the investment using equity method as the Company was able to exercise significant influence over the operating and financing activities of the investee.

The Company determined that there was no impairment on above investments during the years ended December 31, 2012, 2013 and 2014, respectively.

Property and Equipment, Net

12 Months Ended

Dec. 31, 2014

Property, Plant and Equipment [Abstract]

Property and Equipment, Net

6.	PROPERTY AND EQUIPMENT, NET

Property and equipment, net consisted of the following:


	As of December 31,
	2013			2014
Computer equipment	$	3,358		$	9,753
Office equipment		270			1,282
Vehicles		36			35
Leasehold improvement		709			2,576
Less: accumulated depreciation		(989	)		(3,794	)
Exchange difference		(21	)		84

	$	3,363		$	9,936

Depreciation expenses charged to the consolidated statements of operations for the years ended December 31, 2012, 2013 and 2014 were $147, $842 and $2,805, respectively.

- Definition

The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures.

+ References+ Details

Accrued Expenses and Other Current Liabilities

12 Months Ended

Dec. 31, 2014

Payables and Accruals [Abstract]

Accrued Expenses and Other Current Liabilities

7.	ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES

Accrued expenses and other current liabilities consisted of the following:


	As of December 31,
	2013		2014
Accrued payroll and welfare	$	838	$	3,693
Accrued Professional services fee		—		2,984
Payable for advertisement		172		1,670
Deferred government subsidy		330		330
Accrued rental expense		—		266
Other tax payables		72		258
Others		96		214

Total	$	1,508	$	9,415

Fair Value

12 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

Fair Value

8.	FAIR VALUE

Measured on recurring basis

The Group measured its financial assets and liabilities including the cash and cash equivalents at fair value on a recurring basis as of December 31, 2013 and 2014. Cash and cash equivalents are classified within Level 1 of the fair value hierarchy because they are valued based on the quoted market price in an active market.

The Group did not have Level 2 and Level 3 investments as of December 31, 2013 and 2014, respectively.

Measured on nonrecurring basis

Long term investments are measured at fair value on a nonrecurring basis and they are recorded at fair value only when impairment is recognized.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References+ Details

Income Taxes

12 Months Ended

Dec. 31, 2014

Income Tax Disclosure [Abstract]

Income Taxes

9.	INCOME TAXES

Cayman

In July 2014, the Company was redomiciled in the Cayman Islands as an exempted company registered under the laws of the Cayman Islands. Under the current laws of the Cayman Islands, it is not subject to tax on either income or capital gain.

British Virgin Islands (“BVI”)

Momo BVI is a tax-exempted company incorporated in the BVI.

Momo US is incorporated in the United States and is subject to state income tax and federal income tax at different tax rates, depending upon taxable income levels. Momo US did not have taxable income and no income tax expense was provided for the year ended December 31, 2014.

Hong

Kong

Momo HK was established in Hong Kong and is subject to Hong Kong Profits Tax at 16.5% on its activities conducted in Hong Kong.

PRC

In August 2014, Beijing Momo IT was qualified as a software enterprise. As such, Beijing Momo IT will be exempt from income taxes for two years beginning in their first profitable year followed by a tax rate of 12.5% for the succeeding three years. As Beijing Momo IT was still in accumulated loss position, the applicable tax rate for the years ended December 31, 2012, 2013 and 2014 was still 25%.

The other entities incorporated in the PRC are subject to an enterprise income tax at a rate of 25%.

Under the EIT Law and its implementation rules which became effective on January 1, 2008, dividends generated after January 1, 2008 and payable by foreign-invested enterprise in PRC to its foreign investors who are non-resident enterprises are subject to a 10% withholding tax, unless any such foreign investor’s jurisdiction of incorporation has a tax treaty with PRC that provides for a different withholding arrangement. Under the taxation arrangement between the PRC and Hong Kong, a qualified Hong Kong tax resident which is the “beneficial owner” and directly holds 25% or more of the equity interest in a PRC resident enterprise is entitled to a reduced withholding tax rate of 5%. The Cayman Islands, where the Company is incorporated, does not have a tax treaty with PRC.

Since January 1, 2011, the relevant tax authorities of the Group’s subsidiaries have not conducted a tax examination on the Group’s PRC entities. In accordance with relevant PRC tax administration laws, tax years from 2013 to 2014 of the Group’s PRC subsidiary and VIE, remain subject to tax audits as of December 31, 2014, at the tax authority’s discretion.

Uncertainties exist with respect to how the current income tax law in the PRC applies to the Group’s overall operations, and more specifically, with regard to tax residency status. The EIT Law includes a provision specifying that legal entities organized outside of the PRC will be considered residents for Chinese income tax purposes if the place of effective management or control is within the PRC. The implementation rules to the EIT Law provide that non-resident legal entities will be considered China residents if substantial and overall management and control over the manufacturing and business operations, personnel, accounting, properties, etc., occurs within the PRC. Despite the present uncertainties resulting from the limited PRC tax guidance on the issue, the Group does not believe that the legal entities organized outside of the PRC within the Group should be treated as residents for EIT law purposes. If the PRC tax authorities subsequently determine that the Company and its subsidiaries registered outside the PRC should be deemed resident enterprises, the Company and its subsidiaries registered outside the PRC will be subject to the PRC income taxes, at a rate of 25%.

Deferred income taxes reflect the net tax effects of temporary differences between the carrying amount of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of the Group’s deferred tax assets and liabilities are as follows:


	As of December 31,
	2013			2014
Current deferred tax assets:
Advertising expense	$	145		$	—
Accrued payroll		209			916
Accrued expenses		28			—
Less: valuation allowance		(382	)		(916	)

Current deferred tax assets, net		—			—

Non-current deferred tax assets:
Advertising expense		—			3,863
Net operating tax losses carry-forward		2,905			3,068
Less: valuation allowance		(2,905	)		(6,931	)

Non-current deferred tax assets, net		—			—

The Group considers the following factors, among other matters, when determining whether some portion or all of the deferred tax assets will more likely than not be realized: the nature, frequency and severity of recent losses, forecasts of future profitability, the duration of statutory carry-forward periods, the Group’s experience with tax attributes expiring unused and tax planning alternatives. The Group’s ability to realize deferred tax assets depends on its ability to generate sufficient taxable income within the carry-forward periods provided for in the tax law.

As of December 31, 2014, the tax loss carry-forward for Beijing Momo IT, Beijing Momo and its subsidiary amounted to $9,974 and would expire on various dates between December 31, 2016 and December 31, 2019. As of December 31, 2014, the tax loss carry-forward for Momo HK amounted to $200 and would be carried forward indefinitely and set off against its future taxable profits. As of December 31, 2014, the tax loss carry-forward for Momo US amounted to $1,559 and would be carried forward for twenty years. The Group does not file combined or consolidated tax returns, therefore, losses from individual subsidiaries or the VIE may not be used to offset other subsidiaries’ or VIE’s earnings within the Group. Valuation allowance is considered on each individual subsidiary and legal entity basis. Valuation allowances have been established in respect of certain deferred tax assets as it is considered more likely than not that the relevant deferred tax assets will not be realized in the foreseeable future.

Reconciliation between the expense (benefit) of income taxes computed by applying the PRC tax rate to loss before income taxes and the actual provision for income taxes is as follows:


	For the years ended December 31,
	2012			2013			2014
Net loss before provision for income tax	$	(3,839	)	$	(9,326	)	$	(25,415	)
PRC statutory tax rate		25	%		25	%		25	%

Income tax benefit at statutory tax rate		(960	)		(2,332	)		(6,354	)
Permanent differences		(90	)		(285	)		99
Change in valuation allowance		842			2,355			4,560
Effect of income tax rate difference in other jurisdictions		208			262			1,695

Provision for income tax		—			—			—

The Group did not identify significant unrecognized tax benefits for the years ended December 31, 2012, 2013 and 2014. The Group did not incur any interest and penalties related to potential underpaid income tax expenses and also believed that uncertainty in income taxes did not have a significant impact on the unrecognized tax benefits within next twelve months.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References+ Details

Ordinary Shares

12 Months Ended

Dec. 31, 2014

Equity [Abstract]

Ordinary Shares

10.

ORDINARY SHARES

On November 23, 2011, the Company was authorized to issue a maximum 500,000,000 shares of a single class and issued 147,000,000 ordinary shares with a par value of $0.0001.

On April 12, 2012, the authorized 500,000,000 shares were divided into 446,545,450 ordinary shares and 53,454,550 preferred shares in connection with the issuance of Series A-1 and A-2 convertible redeemable participating preferred shares.

In April 2012, the Company’s four founding shareholders entered into an arrangement with the investor in conjunction with the issuance of Series A convertible redeemable participating preferred shares, whereby all of their 147,000,000 ordinary shares (“Founders’ shares”) became subject to service and transfer restrictions. Such Founders’ shares are subject to repurchase by the Company upon early termination of four years of employment of four founders from April 2012. Notwithstanding the foregoing, the Founders shall exercise all rights and privileges of a holder of ordinary shares of the Company with respect to the Founders’ shares. The Founders shall be deemed to be the holder for purposes of receiving any dividends that may be paid with respect to the Founders’ shares and for the purpose of exercising any voting rights relating to the Founders’ shares, even if some or all of Founders’ shares have not yet vested and been released from the repurchase rights. Please refer to Note 12 for disclosure of nonvested restricted shares.

On June 11, 2012, the Company decreased its authorized ordinary shares from 446,545,450 shares to 426,747,470 shares in connection with the issuance of Series A-3 convertible redeemable participating preferred shares.

On July 13, 2012, the Company decreased its authorized ordinary shares from 426,747,470 shares to 366,789,830 shares in connection with the issuance of Series B convertible redeemable participating preferred shares.

On September 12, 2012, a 10-for-1 stock split for all ordinary shares, Series A-1, A-2 and A-3 and Series B convertible redeemable participating preferred shares was approved by the shareholders. While the stock split increased the number of shares for each stockholder, the percentage of their ownership in the Company was not affected. This share split has been retrospectively reflected for all periods presented. In addition, the Company increased its authorized ordinary shares from 366,789,830 to 371,684,330 in connection with the preferred share transfer between investors.

On October 8, 2013, the Company was authorized to issue a maximum 1,000,000,000 shares, which was divided into 835,675,688 ordinary shares and 164,324,312 preferred shares in connection with the issuance of Series C convertible redeemable participating preferred shares.

As of December 31, 2013, there were 147,000,000 ordinary shares issued and outstanding of which 58,187,500 were nonvested restricted shares. The holders of these nonvested restricted shares have a nonforfeitable right to receive dividends with all ordinary shares.

On April 22, 2014, the Company was authorized to issue a maximum 1,000,000,000 shares, which was divided into 799,281,189 ordinary shares and 200,718,811 preferred shares in connection with the issuance of Series D convertible redeemable participating preferred shares.

On April 22, 2014, certain ordinary shareholders who are also the senior management of the Company donated an aggregate of 15,651,589 ordinary shares to the Company with no consideration. On the same date, the Group declared a special dividend to these shareholders at an aggregated amount of $64,494, among which $58,044 was paid in May 2014. The remaining $6,450 was recorded as amount due to related parties-current, please refer to Note 15 for disclosure of related party balances and transactions. The Company treated the whole transaction as a repurchase of ordinary shares of which the repurchase price is considerably lower than the fair value of ordinary share. All such shares were recorded as treasury stock.

On November 28, 2014, the Company was authorized to issue a maximum 1,000,000,000 ordinary shares, which was divided into 800,000,000 Class A Ordinary Shares, 100,000,000 Class B Ordinary Shares and 100,000,000 shares of such class designated as the Board may determine.

On December 16, 2014, the Company completed its IPO and a concurrent private placement upon which the Company’s ordinary shares were divided into Class A ordinary shares and Class B ordinary shares. The Company newly issued 45,688,888 Class A ordinary shares, consisting of (i) 36,800,000 Class A ordinary shares offered through IPO, and (ii) 8,888,888 Class A ordinary shares issued in connection with the concurrent private placement. All of the Company’s Series A, Series B, Series C and Series D preferred shares were automatically converted into 200,718,811 Class A ordinary shares.

As of December 31, 2014, there were 280,869,740 Class A ordinary shares and 96,886,370 Class B ordinary shares issued and outstanding, par value $0.0001 per share, of which 8,807,571 and 48,443,185 were non-vested restricted shares, respectively. The holders of these nonvested restricted shares have a nonforfeitable right to receive dividends with all ordinary shares.

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

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+ Details

Convertible Redeemable Participating Preferred Shares

12 Months Ended

Dec. 31, 2014

Text Block [Abstract]

Convertible Redeemable Participating Preferred Shares

11.

CONVERTIBLE REDEEMABLE PARTICIPATING PREFERRED SHARES

On April 12, 2012, the Group entered into the preferred share purchase agreements with a group of investors to issue an aggregate of 53,454,550 convertible redeemable participating preferred shares Series A-1 (“Series A-1”) and convertible redeemable participating preferred shares Series A-2 (“Series A-2”) to a group of investors for an aggregate consideration of $2,100.

On June 11, 2012, the Group entered into the preferred share purchase agreements with a group of investors to issue an aggregate of 19,797,980 convertible redeemable participating preferred shares Series A-3 (“Series A-3”) (Series A-1, Series A-2 and Series A-3 are collectively referred to as “Series A”) to a group of investors for a consideration of $4,000.

On July 13, 2012, the Group entered into the preferred share purchase agreements with a group of investors to issue an aggregate of 55,063,140 convertible redeemable participating preferred shares Series B (“Series B”) to a group of investors for a consideration of $18,006.

In July 2012, the Group redesignated 4,894,500 Series A-1 preferred shares held by an old investor into Series B preferred shares, and the old investor then transferred 4,894,500 Series B preferred shares to a new investor at the purchase price of $0.286 per share for a total consideration of $1,400 in cash. Also in January 2013, the Group redesignated another 10,079,373 Series A-1 preferred shares of the same old investor into Series B preferred shares, and the old investor then transferred 10,079,373 Series B preferred shares to the same new investor at the purchase price of $0.425 per share for a total consideration of $4,280 in cash. The Group did not receive any proceeds for the transfer between the old investor and the new investor, nor receive any consideration for the redesignation for the shares transferred. The Group accounted for such redesignation as an extinguishment of 4,894,500 and 10,079,373 Series A-1 preferred shares repurchased and recorded $1,361 and $2,766 as deem dividend for the years ended December 31, 2012 and 2013, respectively, based on the difference between the fair value of the consideration transferred to the new investor (i.e., fair value of Series B preferred shares) and the carrying amount of such Series A-1 preferred shares.

On October 8, 2013, the Group entered into the preferred share purchase agreements with a group of investors to issue an aggregate of 36,008,642 convertible redeemable participating preferred shares Series C (“Series C”) to a group of investors for a consideration of $45,000.

On April 22, 2014, the Group entered into the preferred share purchase agreements with a group of investors to issue an aggregate of 43,693,356 convertible redeemable participating preferred shares Series D (“Series D”) to a group of investors for a consideration of $211,750.

On April 22, 2014, the Group entered into the agreements to repurchase 7,298,857 shares of Series A-1 preferred shares from one shareholder for a consideration of $30,750, which was paid in May 2014. The repurchase amount of $30,293 is in excess of the carrying amount of such Series A-1 preferred shares as of April 22, 2014 and was considered as deemed dividend to Series A-1 preferred shareholder and recorded in the accumulated deficit. All the preferred shares repurchased were cancelled on the same date.

On December 16, 2014, Series A, Series B, Series C and Series D preferred shares had been automatically converted into 200,718,811 Class A ordinary shares after the closing of IPO.

Key terms of the preferred shares are summarized as follows:

Voting rights

Shareholders of the preferred shares are entitled to the number of votes equal to the number of ordinary shares into which such preferred shares could be converted at the record date.

Dividends

Whenever a dividend is declared by the board of directors of the Company, the preferred shares holders shall receive, in preference to any dividend on any ordinary shares a cumulative dividend in an amount equal to 8% annually of the Original Issue Price, which was defined as $0.04714, $0.13469, $0.20204, $0.327, $1.2497 and $4.84627 per share for Series A-1, A-2, A-3, B, C and D preferred shares, respectively, as adjusted for stock splits, stock dividends, etc., and shall also participate on an as converted basis with respect to any dividends payable to the ordinary shares. The sequence of dividend participating right of all series of preferred shares was as follows:

(1) Series D

(2) Series C

(3) Series B

(4) Series A-3

(5) Series A-1, A-2

Liquidation preference

In the event of any liquidation, dissolution or winding up of the Company, either voluntary or involuntary, distributions to the shareholders of the Company shall be made in the following manners:

(i)

Before any distribution or payment shall be made to the holders of any ordinary shares, Series A preferred shares, Series B preferred shares or Series C preferred shares, each holder of Series D preferred shares shall be entitled to receive an amount equal to one hundred and thirty percent (130%) of the Original Issue Price of Series D preferred shares (adjusted for any share splits, share dividends, combinations, recapitalizations and similar transactions), plus all dividends accrued and unpaid with respect thereto (as adjusted for any share splits, share dividends, combinations, recapitalizations and similar transactions) per Series D preferred share then held by such holder.

(ii)

After distribution or payment in full of the amount distributable or payable pursuant to (i) and before any distribution or payment shall be made to the holders of any ordinary shares, Series A preferred shares or Series B preferred shares, each holder of Series C preferred shares shall be entitled to receive an amount equal to one hundred and thirty percent (130%) of the Original Issue Price of Series C preferred shares (adjusted for any share splits, share dividends, combinations, recapitalizations and similar transactions), plus all dividends accrued and unpaid with respect thereto (as adjusted for any share splits, share dividends, combinations, recapitalizations and similar transactions) per Series C preferred share then held by such holder.

(iii)

After distribution or payment in full of the amount distributable or payable pursuant to (i) and (ii) and before any distribution or payment shall be made to the holders of any ordinary shares or Series A preferred shares, each holder of Series B preferred shares shall be entitled to receive an amount equal to one hundred percent (100%) of the Original Issue Price of Series B (adjusted for any share splits, share dividends, combinations, recapitalizations and similar transactions), plus all dividends accrued and unpaid with respect thereto (as adjusted for any share splits, share dividends, combinations, recapitalizations and similar transactions) per Series B preferred share then held by such holder.

(iv)

After distribution or payment in full of the amount distributable or payable pursuant to (i), (ii) and (iii) and before any distribution or payment shall be made to the holders of any ordinary shares, Series A-1 preferred shares or Series A-2 preferred shares, each holder of Series A-3 preferred shares shall be entitled to receive an amount equal to one hundred percent (100%) of the Original Issue Price of Series A-3 (adjusted for any share splits, share dividends, combinations, recapitalizations and similar transactions), plus all dividends accrued and unpaid with respect thereto (as adjusted for any share splits, share dividends, combinations, recapitalizations and similar transactions) per Series A-3 preferred share then held by such holder.

(v)

After distribution or payment in full of the amount distributable or payable pursuant to (i), (ii), (iii) and (iv) and before any distribution or payment shall be made to the holders of any ordinary shares, each holder of Series A-1 preferred shares and each holder of Series A-2 preferred shares shall be entitled to receive on a pari passu basis an amount equal to one hundred fifty percent (150%) of the Original Issue Price of Series A-1 or the Original Issue Price of Series A-2 (as the case may be) (adjusted for any share splits, share dividends, combinations, recapitalizations and similar transactions), plus all dividends accrued and unpaid with respect thereto (as adjusted for any share splits, share dividends, combinations, recapitalizations and similar transactions) per Series A-1 preferred share or Series A-2 preferred share, as the case may be, then held by such holder.

(vi)

After distribution or payment in full of the amount distributable or payable on the preferred shares pursuant to (i), (ii), (iii), (iv) and (v), the remaining assets of the Company available for distribution to shareholders shall first be used to pay any accrued but unpaid dividends on other shares and then be distributed ratably among the holders of outstanding ordinary shares and holders of preferred shares on an as-converted basis.

Redemption

At any time after (i) the fourth (4) anniversary of the closing of the Series D preferred share issuance, each holder of the then outstanding Series D preferred shares, or (ii) October 8, 2017, each holder of the then outstanding Series C preferred shares, or (iii) December 31, 2016, each holder of the then outstanding Series A preferred shares and Series B preferred shares, may require that the Company redeem all of its preferred shares.

The redemption price for each Series A-1 and Series A-2 preferred share shall be equal to a price per preferred share which is one hundred and fifty percent (150%) of the applicable Initial Purchase Price (equal to the applicable Original Issue Price), plus all declared or accrued but unpaid dividends thereon up until the date of redemption (adjusted for any share splits, share dividends, combinations, recapitalizations or similar transactions).

The redemption price for Series A-3, Series B, Series C and Series D preferred shares shall be equal to a price per share which is one hundred and twenty-five percent (125%) of the applicable Initial Purchase Price (equal to the applicable Original Issue Price), plus all declared or accrued but unpaid dividends thereon up until the date of redemption (adjusted for any share splits, share dividends, combinations, recapitalizations or similar transactions).

The Group assesses the probability of redemption and accrues proper accretion over the period from the date of issuance to the earliest redemption date of Series A-1, Series A-2, Series A-3, Series B, Series C and Series D preferred shares using the effective interest rate method.

The Group recognized $1,732, $5,354 and $57,663 as deemed dividend on Series A, Series B, Series C and Series D preferred shares accretion of redemption premium for the years ended December 31, 2012, 2013 and 2014, respectively.

Conversion

Each preferred share shall be convertible, at the option of the holder thereof, at any time after the original date of issuance, into such number of fully paid and nonassessable ordinary shares as determined by dividing the applicable Original Issue Price by then-effective conversion price.

The initial conversion ratio was one for one. The conversion price has a standard anti-dilution adjustment term for items such as stock splits and recapitalization. It also has a down-round provision, under which when the Company issues any additional shares at a price per share that is lower than the conversion price per share then in effect, the conversion price per share is adjusted down. There have been no such adjustments to the conversion price.

Each preferred share would automatically be converted into ordinary shares at the then effective conversion price, upon the closing of a Qualified IPO.

“Qualified IPO” means a firm commitment underwritten registered public offering by the Company of its ordinary Shares on the NASDAQ National Market System in the United States or Hong Kong or any other exchange in any other jurisdiction (on any combination of such exchanges and jurisdictions) acceptable to the majority preferred shareholders to the Company with aggregate offering proceeds (before deduction of fees, commissions or expenses) to the Company and selling shareholders, if any, of not less than $50,000 (or any cash proceeds of other currency of equivalent value).

The Company has determined that there was no beneficial conversion feature attributable to the various series of preferred shares because the initial conversion prices was higher than the fair value of the Company’s ordinary shares on issue date of each series shares.

Share-Based Compensation

12 Months Ended

Dec. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-Based Compensation

12.

SHARE-BASED COMPENSATION

Share options

In November 2012, the Company adopted a share incentive plan (“2012 Plan”), which was amended in October 2013. The maximum aggregate number of shares which may be issued pursuant to all awards under the 2012 Plan is 44,758,220 ordinary shares.

On November 1, 2012, the Company granted 9,050,000 and 100,000 share options, respectively, to its employees and consultants with exercise prices of $0.0327 per share, which has a vesting period of 4 years.

On October 10, 2013, the Company granted 8,580,000 and 5,500,000 share options to its employees and executives with exercise prices of $0.1404 per share, which has a vesting period of 4 years.

On March 1, 2014, the Company granted 4,048,660, 444,866 and 100,000 share options to its executives, employees and consultants, respectively, with exercise prices of $0.1404 per share, which has a vesting period of 4 years.

On October 29, 2014, the Company granted 2,963,500 share options to employees with exercise price of $0.0002 per share and vesting period of 4 years.

In November, 2014, the Company adopted the 2014 share incentive plan (“2014 Plan”), pursuant to which a maximum aggregate of 14,031,194 Class A ordinary shares may be issued pursuant to all awards granted thereunder. Beginning in 2017, the number of shares reserved for future issuances under the 2014 Plan will be increased by a number equal to 1.5% of the total number of outstanding shares on the last day of the immediately preceding calendar year, or such lesser number of Class A ordinary shares as determined by the Company’s board of directors, on the first day of each calendar year during the term of the 2014 Plan. With the adoption of the 2014 Plan, the Company will no longer grant any incentive shares under the 2012 Plan.

The following table summarizes information regarding the stock options granted:


	For the years ended December 31,
	2012						2013						2014
	Number of options		Weighted average exercise price per option		Weighted average fair value per option at grant date		Number of options		Weighted average exercise price per option		Weighted average fair value per option at grant date		Number of options			Weighted average exercise price per option		Weighted average fair value per option at grant date
Outstanding at beginning of period		—		—		—		9,150,000	$	0.0327	$	0.1600		23,230,000		$	0.0980	$	0.2412
Granted		9,150,000	$	0.0327	$	0.1600		14,080,000	$	0.1404	$	0.2939		7,557,026		$	0.0854	$	4.9994
Exercised		—		—		—		—		—		—		—			—		—
Forfeited		—		—		—		—		—		—		(67,000	)	$	0.1258	$	0.9649

Outstanding at end of period		9,150,000	$	0.0327	$	0.1600		23,230,000	$	0.0980	$	0.2412		30,720,026		$	0.0948	$	1.4101

There were 8,080,000 vested options, and 22,640,026 options expected to vest as of December 31, 2014. For options expected to vest, the weighted-average exercise price is $0.1003 as of December 31, 2014 and aggregate intrinsic value is $1,775, $7,227 and $133,569 as of December 31, 2012, 2013 and 2014, respectively.

The following table summarizes information with respect to share options outstanding as of December 31, 2014:


	Options outstanding								Options exercisable
	Number outstanding		Weighted average remaining contractual term		Exercise price per option		Aggregate intrinsic value as of December 31, 2014		Number exercisable		Exercise price per option		Aggregate intrinsic value as of December 31, 2014
November 1, 2012		9,150,000		7.84	$	0.0327	$	54,601		4,575,000	$	0.0327	$	27,300
October 10, 2013		14,020,000		8.78	$	0.1404	$	82,152		3,505,000	$	0.1404	$	20,538
March 1 ,2014		4,593,526		9.16	$	0.1404	$	26,916		—		—		—
October 29, 2014		2,956,500		9.83	$	0.0002	$	17,738		—		—		—

		30,720,026					$	181,407		8,080,000			$	47,838

The fair value of options granted was estimated on the date of grant using the binomial tree or Black-Sholes pricing model with the following assumptions used for grants during the applicable periods:


	Risk-free interest rate of return			Contractual term		Volatility			Dividend yield		Exercise price
November 1, 2012		2.31	%		10 years		61.7	%		—	$	0.0327
October 10, 2013		3.09	%		10 years		54.4	%		—	$	0.1404
March 1, 2014		3.25	%		10 years		53.7	%		—	$	0.1404
October 29, 2014		2.44	%		10 years		57.5	%		—	$	0.0002

(1)

Risk-free interest rate

Risk-free interest rate was estimated based on the yield to maturity of China international government bonds with a maturity period close to the expected term of the options.

(2)

Contractual term

The Company used the original contractual term.

(3)

Volatility

The volatility of the underlying ordinary shares during the life of the options was estimated based on the historical stock price volatility of comparable listed companies over a period comparable to the expected term of the options.

(4)

Dividend yield

The dividend yield was estimated by the Group based on its expected dividend policy over the expected term of the options.

(5)

Exercise price

The exercise price of the options was determined by the Group’s board of directors.

(6)

Fair value of underlying ordinary shares

Before closing of IPO, The estimated fair value of the ordinary shares underlying the options as of the respective grant dates was determined based on a retrospective valuation, which used management’s best estimate for projected cash flows as of each valuation date. After closing of IPO, the fair value of the ordinary shares is determined as the closing sales price of the ordinary shares as quoted on the principal exchange or system.

For employee stock options, the Group recorded share-based compensation of $56, $586 and $5,848 during the years ended December 31, 2012, 2013 and 2014, respectively, based on the fair value on the grant dates over the requisite service period of award according to the vesting schedule for employee share option.

For non-employee options the Group recorded share-based compensation of $1, $9 and $437 during the years ended December 31, 2012, 2013 and 2014, respectively, based on the fair value at the commitment date and recognized over the period the service is provided.

As of December 31, 2014, total unrecognized compensation expense relating to unvested share options was $36,127, which will be recognized over 3.44 years. The weighted-average remaining contractual term of options outstanding is 8.65 years.

Non-vested restricted shares

In April 2012, the Company’s four founding shareholders entered into an arrangement with the investor in conjunction with the issuance of Series A preferred shares, whereby all of their 147,000,000 ordinary shares (“Founders’ shares”) became subject to service and transfer restrictions. Such Founders’ shares are subject to repurchase by the Company upon early termination of their four years of employment. The repurchase price is the par value of the ordinary shares. 25% of the Founders’ shares shall be vested annually. The restricted share agreements were subsequently amended on June 11, 2012 and July 18, 2012, respectively. Pursuant to the agreements, 25% of the Founders’ shares shall vest upon the closing of issuance of Series B preferred shares and the remaining 75% shall be vested monthly in equal installments over the next 36 months. This arrangement has been accounted for as a grant of restricted stock awards subject to service vesting conditions. Because the modification does not affect any of the other terms or conditions of the award, presumably the fair value before and after the modification is the same.

On May 15, 2014, the Company’s four founding shareholders entered into an agreement with the investors to renew the arrangement. The Company considered the amendment of agreement as a modification of vesting of the restricted shares. Pursuant to the agreement, the Company shall be entitled to repurchase 50% and 25% of such shares in the case that founders terminate their employments with the Company before April 17, 2015 and during the period from April 17, 2015 to April 17, 2016, respectively, at a price of US$0.0001 per share or the lowest price permitted under applicable laws. Therefore, the Company considered that 50% of the total restricted shares were vested immediately on the amendment date and 25% shall be vested annually on April 17 in the next two years ending April 17, 2016. Before the modification date, May 15, 2014, there were 131,348,411 ordinary shares, of which 45,937,500 were unvested restricted shares. As the result of modification, 19,736,705 vested ordinary shares were classified to unvested restricted shares on the modification date and the corresponding compensation costs for these unvested restricted shares were amortized over the remaining service period. Because the modification does not affect any of the other terms or conditions of the award, the fair value of the restricted shares before and after the modification is the same.

A summary of non-vested restricted share activity during the years ended December 31, 2012, 2013 and 2014 is presented below:


	Number of shares
Outstanding as of January 1, 2012		147,000,000
Granted		—
Forfeited		—
Vested		(52,062,500	)

Outstanding as of December 31, 2012		94,937,500
Granted		—
Forfeited		—
Vested		(36,750,000	)

Outstanding as of December 31, 2013		58,187,500
Granted		—
Modification		19,736,705
Vested		(20,673,449	)

Outstanding as of December 31, 2014		57,250,756

The weighted average grant date fair value of the non-vested restricted shares was $0.01 per share and the aggregated fair value was $1,470.

The Company recorded compensation expense of $535, $368 and $335 during the years ended December 31, 2012, 2013 and 2014, respectively, related to non-vested restricted shares.

As of December 31, 2014, total unrecognized compensation expense relating to the non-vested restricted shares was $232. The amount is expected to be recognized over 1.30 years using the straight-line method.

Restricted share units (“RSUs”)

On December 11, 2014, the Company granted a total of 40,001 shares of RSUs to employees under the 2014 Plan.

The restricted share units will vest in accordance with the vesting schedule set out in the RSUs award agreement, which is 50% of the RSUs shall vest at the end of every six months since the grant date. The Company will forfeit the unvested portion of the RSUs if the grantees terminate their service during the vesting period.

The fair value of these RSUs is measured on the grant date based on the market price of the ordinary share on the grant date. The following table summarizes information regarding the share units granted:


	Number of shares
Outstanding as of January 1, 2014		—
Granted		40,001
Forfeited		—
Vested		—

Outstanding as of December 31, 2014		40,001

The weighted average grant date fair value of RSUs was $8.51 per share and the aggregated fair value was $340.

The intrinsic value of RSUs vested was $nil for the year ended December 31, 2014. The weighted average remaining contractual terms and aggregate instinct value of RSUs, which were expected to vest, as of the year ended December 31, 2014 were 0.95 years and $240, respectively.

The Group recorded share-based compensation of $18 for RSUs during the year ended December 31, 2014, based on the fair value on the grant dates over the requisite service period of award using the straight-line method.

As of December 31, 2014, total unrecognized compensation expense relating to RSUs was $322. The amount is expected to be recognized over a weighted average period of 0.95 years using the straight-line method.

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References+ Details

Net Loss Per Share

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Net Loss Per Share

13.

NET LOSS PER SHARE

The Group has determined that its convertible redeemable participating preferred shares are participating securities as the preferred shares participate in undistributed earnings on an as-if-converted basis. The holders of the preferred shares are entitled to receive dividends on a pro rata basis, as if their shares had been converted into ordinary shares. The Group determined that the nonvested restricted shares are participating securities as the holders of the nonvested restricted shares have a nonforfeitable right to receive dividends with all ordinary shares but the nonvested restricted shares do not have a contractual obligation to fund or otherwise absorb the Company’s losses. Accordingly, the Group uses the two-class method of computing net loss per share, for ordinary shares, nonvested restricted shares and preferred shares according to the participation rights in undistributed earnings.

The calculation of net loss per share is as follows:


	For the years ended December 31,
	2012			2013			2014
Numerator:
Net loss attributable to Momo Inc	$	(3,839	)	$	(9,326	)	$	(25,415	)
Deemed dividend to Series A-1 and Series A-2 shares		(363	)		(524	)		(30,910	)
Deemed dividend to Series A-3 shares		(265	)		(509	)		(544	)
Deemed dividend to Series B shares		(2,465	)		(5,652	)		(3,116	)
Deemed dividend to Series C shares		—			(1,435	)		(5,596	)
Deemed dividend to Series D shares		—			—			(17,497	)
Undistributed earnings allocated to Series A shares		—			—			—
Undistributed earnings allocated to Series B shares		—			—			—
Undistributed earnings allocated to Series C shares		—			—			—
Undistributed earnings allocated to Series D shares		—			—			—
Undistributed earnings allocated to participating nonvested restricted shares		—			—			—

Net loss attributed to ordinary shareholders for computing net loss per ordinary share-basic and diluted	$	(6,932	)	$	(17,446	)	$	(83,078	)

Denominator:
Denominator for computing net loss per share-basic:
Weighted average ordinary shares outstanding used in computing net loss per ordinary share-basic		60,103,654			67,190,411			85,293,775
Weighted average shares used in computing net loss per participating nonvested restricted share		86,896,346			79,809,589			60,951,591
Weighted average shares used in computing net income per Series A-1 and Series A-2 share		36,124,555			38,977,742			32,176,676
Weighted average shares used in computing net income per Series A-3 share		10,980,847			19,797,980			18,990,997
Weighted average shares used in computing net income per Series B share		28,012,996			69,513,767			67,182,243
Weighted average shares used in computing net income per Series C share		—			7,280,436			34,540,898
Weighted average shares used in computing net income per Series D share		—			—			28,348,231

Denominator for computing net loss per share-diluted:
Weighted average shares outstanding used in computing net loss per ordinary share-diluted		60,103,654			67,190,411			85,293,775

Net loss per ordinary share attributable to Momo Inc.
- basic	$	(0.12	)	$	(0.26	)	$	(0.97	)
Net income per participating nonvested restricted share	$	—		$	—		$	—
Net income per Series A-1 and Series A-2 share	$	0.01		$	0.01		$	0.96
Net income per Series A-3 share	$	0.02		$	0.03		$	0.03
Net income per Series B share	$	0.09		$	0.08		$	0.05
Net income per Series C share	$	—		$	0.20		$	0.16
Net income per Series D share	$	—		$	—		$	0.62

Net loss per ordinary share attributable to Momo Inc.
- diluted	$	(0.12	)	$	(0.26	)	$	(0.97	)

The following table summarizes potential ordinary shares outstanding excluded from the computation of diluted net loss per ordinary share for the years ended December 31, 2012, 2013 and 2014, because their effect is anti-dilutive:


	For the years ended December 31,
	2012		2013		2014
Share issuable upon exercise of share options		49,976		1,014,557		21,831,082
Share issuable upon exercise of RSUs		—		—		—
Share issuable upon vesting of nonvested restricted shares		86,896,346		79,809,589		60,951,591
Share issuable upon conversion of Series A-1 and Series A-2 shares		36,124,555		38,977,742		32,176,676
Share issuable upon conversion of Series A-3 shares		10,980,847		19,797,980		18,990,997
Share issuable upon conversion of Series B shares		28,012,996		69,513,767		67,182,243
Share issuable upon conversion of Series C shares		—		7,280,436		34,540,898
Share issuable upon conversion of Series D shares		—		—		28,348,231

- Definition

The entire disclosure for earnings per share.

+ References+ Details

Commitments and Contingencies

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

14.

COMMITMENTS AND CONTINGENCIES

Lease commitment

The Group leases certain office premises under non-cancellable leases. These leases expire through 2017 and are renewable upon negotiation. Rental expenses under operating leases for the years ended December 31, 2012, 2013 and 2014 were $446, $937 and $2,995, respectively.

Future minimum payments under non-cancellable operating leases as of December 31, 2014 were as follows:


2015	$	3,307
2016		1,516
2017		419
2018 and after		—

Total	$	5,242

Contingencies

There were no material contingencies noted for the years ended December 31, 2012, 2013 and 2014, respectively.

- Definition

The entire disclosure for commitments and contingencies.

+ References+ Details

Related Party Balances and Transactions

12 Months Ended

Dec. 31, 2014

Related Party Balances and Transactions

15.

RELATED PARTY BALANCES AND TRANSACTIONS


	As of December 31,
	2013		2014
Amount due from a related party-current
Amount due from an ordinary shareholder	$	198	$	—

Amount due to related parties-current
Amount due to ordinary shareholders	$	—	$	6,450

The amount as of December 31, 2013 represents personal loan provided by the Group to Mr. Yan Tang with no interest charges, and it was fully repaid in June 2014.

The amount as of December 31, 2014 represents the unpaid repurchase amount by the Group to its ordinary shareholders. Please refer to Note 10 for repurchase of ordinary shares.

- Definition

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References+ Details

Segment Information

12 Months Ended

Dec. 31, 2014

Segment Reporting [Abstract]

Segment Information

16.

SEGMENT INFORMATION

The Group’s chief operating decision maker has been identified as the Chief Executive Officer (“CEO”), who reviews consolidated results when making decisions about allocating resources and assessing performance of the Group. The Group’s revenue and net income are substantially derived from membership subscription services, offering the platform for mobile games developed by third parties and other services, including the use of the paid emoticons and mobile marketing services. But the Group does not have discrete financial information of costs and expenses between various services in its internal reporting, and reports costs and expenses by nature as a whole. Therefore, The Group has one operating segment.

The table below is only presented at the revenue level with no allocations of direct or indirect cost and expenses. The Group operates in the PRC; most of the Group’s long-lived assets are located in the PRC and all services are provided in the PRC.

Components of revenues are presented in the following table:


	For the years ended December 31,
	2012		2013		2014
Membership subscription		—	$	2,808	$	29,756
Mobile games		—		92		11,237
Other services		—		229		3,762

Total		—	$	3,129	$	44,755

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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+ Details

Employee Benefit Plan

12 Months Ended

Dec. 31, 2014

Compensation and Retirement Disclosure [Abstract]

Employee Benefit Plan

17.

EMPLOYEE BENEFIT PLAN

Full time employees of the Group in the PRC participate in a government-mandated defined contribution plan pursuant to which certain pension benefits, medical care, unemployment insurance, employee housing fund and other welfare benefits are provided to employees. The Group accrues for these benefits based on certain percentages of the employees’ salaries. The total provisions for such employee benefits were $311, $978 and $2,635 for the years ended December 31, 2012, 2013 and 2014, respectively.

- Definition

The entire disclosure for pension and other postretirement benefits.

+ References+ Details

Statutory Reserves and Restricted Net Assets

12 Months Ended

Dec. 31, 2014

Receivables [Abstract]

Statutory Reserves and Restricted Net Assets

18.

STATUTORY RESERVES AND RESTRICTED NET ASSETS

In accordance with the Regulations on Enterprises with Foreign Investment of China and their articles of association, the Group’s subsidiaries and VIE located in the PRC, being foreign invested enterprises established in the PRC, are required to provide for certain statutory reserves. These statutory reserve funds include one or more of the following: (i) a general reserve, (ii) an enterprise expansion fund or discretionary reserve fund, and (iii) a staff bonus and welfare fund. Subject to certain cumulative limits, the general reserve fund requires a minimum annual appropriation of 10% of after-tax profit (as determined under accounting principles generally accepted in China at each year-end); the other fund appropriations are at the subsidiaries’ or the affiliated PRC entities’ discretion. These statutory reserve funds can only be used for specific purposes of enterprise expansion, staff bonus and welfare, and are not distributable as cash dividends except in the event of liquidation of our subsidiaries, our affiliated PRC entities and their respective subsidiaries. The Group’s subsidiaries and VIE are required to allocate at least 10% of their after tax profits to the general reserve until such reserve has reached 50% of their respective registered capital. As of December 31, 2014, none of the Group’s PRC subsidiary and VIE had a general reserve that reached the 50% of their registered capital threshold, therefore they will continue to allocate at least 10% of their after tax profits to the general reserve fund.

Appropriations to the enterprise expansion reserve and the staff welfare and bonus reserve are to be made at the discretion of the board of directors of each of the Group’s subsidiaries.

The appropriation to these reserves by the Group’s PRC subsidiary and VIE was $nil, $nil and $nil for the years ended December 31, 2012, 2013 and 2014 due to accumulated deficit.

Relevant PRC laws and regulations restrict the WFOE, VIE and VIE’s subsidiary from transferring a portion of their net assets, equivalent to the balance of their statutory reserves and their paid in capital, to the Company in the form of loans, advances or cash dividends. The WFOE’s accumulated profits may be distributed as dividends to the Company without the consent of a third party. The VIE and VIE’s subsidiary’s revenues and accumulated profits may be transferred to the Company through contractual arrangements without the consent of a third party. Under applicable PRC law, loans from PRC companies to their offshore affiliated entities require governmental approval, and advances by PRC companies to their offshore affiliated entities must be supported by bona fide business transactions. The capital and statutory reserves restricted which represented the amount of net assets of the WFOE, VIE and VIE’s subsidiary in the Group not available for distribution were $455, $12,047 and $93,537 as of December 31, 2012, 2013 and 2014, respectively.

Subsequent Events

12 Months Ended

Dec. 31, 2014

Subsequent Events [Abstract]

Subsequent Events

19.

SUBSEQUENT EVENTS

The Group has evaluated events subsequent to the balance sheet date of December 31, 2014 through April 20, 2015, the date on which the financial statements were available to be issued.

Newly issued share options

In January 2015, Momo BVI granted 1,750,000 and 5,000,000 share options to employees and an executive of its wholly owned subsidiary with an exercise price of $0.10 and $0.11 per share, respectively, with the vesting period of 4 years. The fair value was estimated approximately $0.055 and $0.052 per share for employees and an executive, respectively. The total compensation expense relating to the options was approximately $0.4 million.

Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2014

Basis of presentation

The consolidated financial statements of the Group have been prepared in accordance with the accounting principles generally accepted in the United States of America (“U.S. GAAP”).

Basis of consolidation

Use of estimates

Cash and cash equivalents

Accounts receivable

Financial instruments

Foreign currency risk

Cost method investment

Equity method investment

Property and equipment, net

Property and equipment are stated at cost less accumulated depreciation. Depreciation is calculated on a straight-line basis over the following estimated useful lives:


Office equipment			3-5 years
Computer equipment			3 years
Vehicles			5 years
Leasehold improvement			Shorter of the lease term or
			estimated useful lives

Impairment of long-lived assets

Fair value

Level 1

Level 1 applies to assets or liabilities for which there are quoted prices in active markets for identical assets or liabilities.

Level 2

Level 3

Level 3 applies to assets or liabilities for which there are unobservable inputs to the valuation methodology that are significant to the measurement of the fair value of the assets or liabilities.

Revenue recognition

(a)

Membership subscription

Net revenues of $nil, $2,808 and $29,756 were recognized for membership subscription for the years ended December 31, 2012, 2013 and 2014, respectively.

(b)

Mobile games

Non-exclusive mobile games services

Exclusive mobile games services

Net revenues of $nil, $92 and $11,237 were recognized for mobile games for the years ended December 31, 2012, 2013 and 2014, respectively.

(c)

Paid emoticons

Net revenues of $nil, $217 and $1,787 were recognized for the use of emoticons on its platform for the years ended December 31, 2012, 2013 and 2014, respectively.

Advertising barter transactions

Deferred revenue

Cost of revenues

Government subsidies

The Group records such government subsidies as a liability when it is received and records it as other operating income when there is no further performance obligation.

Research and development expenses

Value added taxes

Income taxes

Foreign currency translation

Operating leases

Advertising expenses

Comprehensive loss

Comprehensive loss includes net loss and foreign currency translation adjustments. Comprehensive loss is reported in the consolidated statements of comprehensive loss.

Share-based compensation

Share awards issued to nonemployees are measured at fair value at the earlier of the commitment date or the date the services is completed and recognized over the period the service is provided.

Earnings (loss) per share

Basic loss per ordinary share is computed by dividing net loss attributable to ordinary shareholders by the weighted average number of ordinary shares outstanding during the period.

Recent accounting pronouncements adopted

Recent accounting pronouncements not yet adopted

•

Step 1: Identify the contract(s) with a customer.

•

Step 2: Identify the performance obligations in the contract.

•

Step 3: Determine the transaction price.

•

Step 4: Allocate the transaction price to the performance obligations in the contract.

•

Step 5: Recognize revenue when (or as) the entity satisfies a performance obligation.

An entity should apply the amendments in this ASU using one of the following two methods:

Retrospectively to each prior reporting period presented and the entity may elect any of the following practical expedients:

•

For completed contracts, an entity need not restate contracts that begin and end within the same annual reporting period.

•

The amount by which each financial statement line item is affected in the current reporting period by the application of this ASU as compared to the guidance that was in effect before the change.

•

An explanation of the reasons for significant changes.

The Group is in the process of evaluating the impact of adoption of this guidance on the Group’s consolidated financial statements.

Accounts Receivable [Member]

Concentration of credit risk and revenue

Concentration of credit risk

Third-party payment channels accounting for 10% or more of accounts receivables are as follows:


	December 31,
	2013			2014
A		69	%		8	%
B		24	%		34	%
C		6	%		26	%

No user accounted for 10% or more of accounts receivables for the years ended December 31, 2013 and 2014, respectively.

Revenues [Member]

Concentration of credit risk and revenue

Concentration of revenue

The following table summarizes sales generated from games that individually accounting for 10% or more of net revenues:


	For the years ended December 31,
	2012		2013		2014
Game D		—		—		14	%

No user accounted for 10% or more of net revenues for the years ended December 31, 2012, 2013 and 2014, respectively.

Organization and Principal Activities (Tables)

12 Months Ended

Dec. 31, 2014

Text Block [Abstract]

Schedule of Subsidiaries, VIE and VIE's Subsidiary

As of December 31, 2014, details of the Company’s subsidiaries, VIE and VIE’s subsidiary are as follows:


			Percentage
	Date of	Place of	of economic
	incorporation	incorporation	ownership
Subsidiaries
Momo Technology HK Company Limited (“Momo HK”)	December 5, 2011	Hong Kong		100	%
Beijing Momo Information Technology Company Limited (“Beijing Momo IT”)	March 9, 2012	PRC		100	%
Momo Technology Overseas Holding Company Limited (“Momo BVI”)	March 5, 2014	BVI		100	%
Momo Information Technologies Corp. (“Momo US”)	March 7, 2014	US		100	%
VIE
Beijing Momo Technology Co., Ltd. (“Beijing Momo”)	July 7, 2011	PRC		N/A	*
VIE’s subsidiary
Chengdu Momo Technology Co., Ltd. (“Chengdu Momo”)	May 9, 2013	PRC		N/A	*

*	These entities are controlled by the Company pursuant to the contractual arrangements disclosed below.

Schedule of Amounts and Balances of VIE Included in Consolidated Financial Statements After Elimination of Intercompany Balances and Transactions


	As of December 31,
	2013		2014
Cash and cash equivalents	$	861	$	9,867
Accounts receivable, net of allowance for doubtful accounts of $nil and $nil as of December 31, 2013 and 2014, respectively		1,935		7,038
Prepaid expenses and other current assets		435		5,306

Total current assets		3,231		22,211

Property and equipment, net		1,189		1,318
Rental deposits		—		312
Long term investments		—		809

Total assets		4,420		24,650

Accounts payable		125		3,728
Deferred revenue		3,714		16,348
Accrued expenses and other current liabilities		684		1,100

Total current liabilities		4,523		21,176

Total liabilities	$	4,523	$	21,176


	For the years ended December 31,
	2012			2013			2014
Net revenues	$	—		$	3,129		$	44,755
Net (loss) profit	$	(2,292	)	$	(2,179	)	$	32,945


	For the years ended December 31,
	2012			2013			2014
Net cash (used in) provided by operating activities	$	(3,005	)	$	(2,956	)	$	40,383
Net cash used in investing activities	$	(1,039	)	$	(723	)	$	(1,921	)
Net cash used in financing activities	$	—		$	—		$	—

- Definition

Tabular disclosure of the significant judgments and assumptions made in determining whether a variable interest (as defined) held by the entity requires the variable interest entity (VIE) (as defined) to be consolidated and (or) disclose information about its involvement with the VIE, individually or in aggregate (as applicable); the nature of restrictions, if any, on the consolidated VIE's assets and on the settlement of its liabilities reported by an entity in its statement of financial position, including the carrying amounts of such assets and liabilities; the nature of, and changes in, the risks associated with involvement in the VIE; how involvement with the VIE affects the entity's financial position, financial performance, and cash flows; the lack of recourse if creditors (or beneficial interest holders) of the consolidated VIE have no recourse to the general credit of the primary beneficiary (if applicable); the terms of arrangements, giving consideration to both explicit arrangements and implicit variable interests, if any, that could require the entity to provide financial support to the VIE, including events or circumstances that could expose the entity to a loss; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance are shared (as defined); the carrying amounts and classification of assets and liabilities of the VIE included in the statement of financial position; the entity's maximum exposure to loss, if any, as a result of its involvement with the VIE, including how the maximum exposure is determined and significant sources of the entity's exposure to the VIE; a comparison of the carrying amounts of the assets and liabilities and the entity's maximum exposure to loss; information about any liquidity arrangements, guarantees, and (or) other commitments by third parties that may affect the fair value or risk of the entity's variable interest in the VIE; whether or not the entity has provided financial support or other support (explicitly or implicitly) to the VIE that it was not previously contractually required to provide or whether the entity intends to provide that support, including the type and amount of the support and the primary reasons for providing the support; and supplemental information the entity determines necessary to provide.

+ References+ Details

Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2014

Schedule of Estimated Useful Lives of Property and Equipment

Depreciation is calculated on a straight-line basis over the following estimated useful lives:


Office equipment			3-5 years
Computer equipment			3 years
Vehicles			5 years
Leasehold improvement			Shorter of the lease term or
			estimated useful lives

Accounts Receivable [Member]

Schedules of Concentration of Risk, by Risk Factor

Third-party payment channels accounting for 10% or more of accounts receivables are as follows:


	December 31,
	2013			2014
A		69	%		8	%
B		24	%		34	%
C		6	%		26	%

Revenues [Member]

Schedules of Concentration of Risk, by Risk Factor

The following table summarizes sales generated from games that individually accounting for 10% or more of net revenues:


	For the years ended December 31,
	2012		2013		2014
Game D		—		—		14	%

- Definition

Tabular disclosure of the nature of a concentration, a benchmark to which it is compared, and the percentage that the risk is to the benchmark.

+ References+ Details

Accounts Receivable, Net (Tables)

12 Months Ended

Dec. 31, 2014

Receivables [Abstract]

Schedule of Accounts Receivable, Net

Accounts receivable, net consisted of the following:


	As of December 31,
	2013		2014
Accounts receivable	$	1,935	$	7,038
Less: allowance for doubtful accounts		—		—

Accounts receivable, net	$	1,935	$	7,038

Prepaid Expenses and Other Current Assets (Tables)

12 Months Ended

Dec. 31, 2014

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Schedule of Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consisted of the following:


	As of December 31,
	2013		2014
Advance to game developers	$	77	$	2,894
VAT input (note 1)		281		2,173
Deferred platform commission cost		315		1,878
Prepaid expenses		—		416
Interest receivable		—		368
Prepaid rental expenses		114		35
Advance to advertisement suppliers		58		3
Rental deposit		308		2
Others		51		240

	$	1,204	$	8,009

Note 1:

VAT input mainly occurred from the purchasing of property and equipment and advertising activities.

Long Term Investments (Tables)

12 Months Ended

Dec. 31, 2014

Investments Schedule [Abstract]

Summary of Equity and Cost Method Investments


	As of December 31,
	2013		2014
Equity method investment
Shanghai Touch Future Network Technology Co., Ltd	$	—	$	483
Cost method investments
Shanghai Shuanglang Technology Co., Ltd		—		326
Smartisan Technology Co., Ltd.		951		951

	$	951	$	1,760

Property and Equipment, Net (Tables)

12 Months Ended

Dec. 31, 2014

Property, Plant and Equipment [Abstract]

Schedule of Property and Equipment, Net

Property and equipment, net consisted of the following:


	As of December 31,
	2013			2014
Computer equipment	$	3,358		$	9,753
Office equipment		270			1,282
Vehicles		36			35
Leasehold improvement		709			2,576
Less: accumulated depreciation		(989	)		(3,794	)
Exchange difference		(21	)		84

	$	3,363		$	9,936

Accrued Expenses and Other Current Liabilities (Tables)

12 Months Ended

Dec. 31, 2014

Payables and Accruals [Abstract]

Schedule of Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following:


	As of December 31,
	2013		2014
Accrued payroll and welfare	$	838	$	3,693
Accrued Professional services fee		—		2,984
Payable for advertisement		172		1,670
Deferred government subsidy		330		330
Accrued rental expense		—		266
Other tax payables		72		258
Others		96		214

Total	$	1,508	$	9,415

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

Income Tax Disclosure [Abstract]

Components of Group's Deferred Tax Assets and Liabilities

Significant components of the Group’s deferred tax assets and liabilities are as follows:


	As of December 31,
	2013			2014
Current deferred tax assets:
Advertising expense	$	145		$	—
Accrued payroll		209			916
Accrued expenses		28			—
Less: valuation allowance		(382	)		(916	)

Current deferred tax assets, net		—			—

Non-current deferred tax assets:
Advertising expense		—			3,863
Net operating tax losses carry-forward		2,905			3,068
Less: valuation allowance		(2,905	)		(6,931	)

Non-current deferred tax assets, net		—			—

Schedule of Reconciliation between Income Taxes Expense (Benefit) to Loss before Income Taxes and Actual Provision for Income Taxes

Reconciliation between the expense (benefit) of income taxes computed by applying the PRC tax rate to loss before income taxes and the actual provision for income taxes is as follows:


	For the years ended December 31,
	2012			2013			2014
Net loss before provision for income tax	$	(3,839	)	$	(9,326	)	$	(25,415	)
PRC statutory tax rate		25	%		25	%		25	%

Income tax benefit at statutory tax rate		(960	)		(2,332	)		(6,354	)
Permanent differences		(90	)		(285	)		99
Change in valuation allowance		842			2,355			4,560
Effect of income tax rate difference in other jurisdictions		208			262			1,695

Provision for income tax		—			—			—

Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Stock Options Granted

The following table summarizes information regarding the stock options granted:


	For the years ended December 31,
	2012						2013						2014
	Number of options		Weighted average exercise price per option		Weighted average fair value per option at grant date		Number of options		Weighted average exercise price per option		Weighted average fair value per option at grant date		Number of options			Weighted average exercise price per option		Weighted average fair value per option at grant date
Outstanding at beginning of period		—		—		—		9,150,000	$	0.0327	$	0.1600		23,230,000		$	0.0980	$	0.2412
Granted		9,150,000	$	0.0327	$	0.1600		14,080,000	$	0.1404	$	0.2939		7,557,026		$	0.0854	$	4.9994
Exercised		—		—		—		—		—		—		—			—		—
Forfeited		—		—		—		—		—		—		(67,000	)	$	0.1258	$	0.9649

Outstanding at end of period		9,150,000	$	0.0327	$	0.1600		23,230,000	$	0.0980	$	0.2412		30,720,026		$	0.0948	$	1.4101

Summary of Share Options Outstanding

The following table summarizes information with respect to share options outstanding as of December 31, 2014:


	Options outstanding								Options exercisable
	Number outstanding		Weighted average remaining contractual term		Exercise price per option		Aggregate intrinsic value as of December 31, 2014		Number exercisable		Exercise price per option		Aggregate intrinsic value as of December 31, 2014
November 1, 2012		9,150,000		7.84	$	0.0327	$	54,601		4,575,000	$	0.0327	$	27,300
October 10, 2013		14,020,000		8.78	$	0.1404	$	82,152		3,505,000	$	0.1404	$	20,538
March 1 ,2014		4,593,526		9.16	$	0.1404	$	26,916		—		—		—
October 29, 2014		2,956,500		9.83	$	0.0002	$	17,738		—		—		—

		30,720,026					$	181,407		8,080,000			$	47,838

Schedule of Assumptions Used to Estimate Fair Value of Stock Options Granted


	Risk-free interest rate of return			Contractual term		Volatility			Dividend yield		Exercise price
November 1, 2012		2.31	%		10 years		61.7	%		—	$	0.0327
October 10, 2013		3.09	%		10 years		54.4	%		—	$	0.1404
March 1, 2014		3.25	%		10 years		53.7	%		—	$	0.1404
October 29, 2014		2.44	%		10 years		57.5	%		—	$	0.0002

Summary of Non-Vested Restricted Share Activity

A summary of non-vested restricted share activity during the years ended December 31, 2012, 2013 and 2014 is presented below:


	Number of shares
Outstanding as of January 1, 2012		147,000,000
Granted		—
Forfeited		—
Vested		(52,062,500	)

Outstanding as of December 31, 2012		94,937,500
Granted		—
Forfeited		—
Vested		(36,750,000	)

Outstanding as of December 31, 2013		58,187,500
Granted		—
Modification		19,736,705
Vested		(20,673,449	)

Outstanding as of December 31, 2014		57,250,756

Summary of Restricted Share Units Granted

The following table summarizes information regarding the share units granted:


	Number of shares
Outstanding as of January 1, 2014		—
Granted		40,001
Forfeited		—
Vested		—

Outstanding as of December 31, 2014		40,001

Net Loss Per Share (Tables)

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Calculation of Net Loss Per Share

The calculation of net loss per share is as follows:


	For the years ended December 31,
	2012			2013			2014
Numerator:
Net loss attributable to Momo Inc	$	(3,839	)	$	(9,326	)	$	(25,415	)
Deemed dividend to Series A-1 and Series A-2 shares		(363	)		(524	)		(30,910	)
Deemed dividend to Series A-3 shares		(265	)		(509	)		(544	)
Deemed dividend to Series B shares		(2,465	)		(5,652	)		(3,116	)
Deemed dividend to Series C shares		—			(1,435	)		(5,596	)
Deemed dividend to Series D shares		—			—			(17,497	)
Undistributed earnings allocated to Series A shares		—			—			—
Undistributed earnings allocated to Series B shares		—			—			—
Undistributed earnings allocated to Series C shares		—			—			—
Undistributed earnings allocated to Series D shares		—			—			—
Undistributed earnings allocated to participating nonvested restricted shares		—			—			—

Net loss attributed to ordinary shareholders for computing net loss per ordinary share-basic and diluted	$	(6,932	)	$	(17,446	)	$	(83,078	)

Denominator:
Denominator for computing net loss per share-basic:
Weighted average ordinary shares outstanding used in computing net loss per ordinary share-basic		60,103,654			67,190,411			85,293,775
Weighted average shares used in computing net loss per participating nonvested restricted share		86,896,346			79,809,589			60,951,591
Weighted average shares used in computing net income per Series A-1 and Series A-2 share		36,124,555			38,977,742			32,176,676
Weighted average shares used in computing net income per Series A-3 share		10,980,847			19,797,980			18,990,997
Weighted average shares used in computing net income per Series B share		28,012,996			69,513,767			67,182,243
Weighted average shares used in computing net income per Series C share		—			7,280,436			34,540,898
Weighted average shares used in computing net income per Series D share		—			—			28,348,231

Denominator for computing net loss per share-diluted:
Weighted average shares outstanding used in computing net loss per ordinary share-diluted		60,103,654			67,190,411			85,293,775

Net loss per ordinary share attributable to Momo Inc.
- basic	$	(0.12	)	$	(0.26	)	$	(0.97	)
Net income per participating nonvested restricted share	$	—		$	—		$	—
Net income per Series A-1 and Series A-2 share	$	0.01		$	0.01		$	0.96
Net income per Series A-3 share	$	0.02		$	0.03		$	0.03
Net income per Series B share	$	0.09		$	0.08		$	0.05
Net income per Series C share	$	—		$	0.20		$	0.16
Net income per Series D share	$	—		$	—		$	0.62

Net loss per ordinary share attributable to Momo Inc.
- diluted	$	(0.12	)	$	(0.26	)	$	(0.97	)

Summary of Potential Ordinary Shares Outstanding Excluded from Computation of Diluted Net Loss Per Ordinary Share


	For the years ended December 31,
	2012		2013		2014
Share issuable upon exercise of share options		49,976		1,014,557		21,831,082
Share issuable upon exercise of RSUs		—		—		—
Share issuable upon vesting of nonvested restricted shares		86,896,346		79,809,589		60,951,591
Share issuable upon conversion of Series A-1 and Series A-2 shares		36,124,555		38,977,742		32,176,676
Share issuable upon conversion of Series A-3 shares		10,980,847		19,797,980		18,990,997
Share issuable upon conversion of Series B shares		28,012,996		69,513,767		67,182,243
Share issuable upon conversion of Series C shares		—		7,280,436		34,540,898
Share issuable upon conversion of Series D shares		—		—		28,348,231

Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Payments under Non-Cancellable Operating Leases

Future minimum payments under non-cancellable operating leases as of December 31, 2014 were as follows:


2015	$	3,307
2016		1,516
2017		419
2018 and after		—

Total	$	5,242

Related Party Balances and Transactions (Tables)

12 Months Ended

Dec. 31, 2014

Schedule of Amount Due from Related Party


	As of December 31,
	2013		2014
Amount due from a related party-current
Amount due from an ordinary shareholder	$	198	$	—

Amount due to related parties-current
Amount due to ordinary shareholders	$	—	$	6,450

Segment Information (Tables)

12 Months Ended

Dec. 31, 2014

Segment Reporting [Abstract]

Components of Revenues

Components of revenues are presented in the following table:


	For the years ended December 31,
	2012		2013		2014
Membership subscription		—	$	2,808	$	29,756
Mobile games		—		92		11,237
Other services		—		229		3,762

Total		—	$	3,129	$	44,755

Organization and Principal Activities - Additional Information (Detail)	12 Months Ended				0 Months Ended	1 Months Ended	12 Months Ended		0 Months Ended	1 Months Ended	0 Months Ended	1 Months Ended					12 Months Ended		1 Months Ended	12 Months Ended			0 Months Ended				12 Months Ended
	Dec. 31, 2014 Terms Assets Creditor	Dec. 31, 2013	Dec. 31, 2012	Nov. 23, 2011 USD ($)	Dec. 16, 2014 Class A Common Stock [Member]	Dec. 31, 2014 Class A Common Stock [Member]	Dec. 31, 2014 Class A Common Stock [Member]	Dec. 31, 2014 Class B Common Stock [Member]	Dec. 16, 2014 IPO [Member] Class A Common Stock [Member]	Dec. 31, 2014 IPO [Member] Class A Common Stock [Member]	Dec. 16, 2014 Private Placement [Member] Class A Common Stock [Member]	Dec. 31, 2014 Private Placement [Member] Class A Common Stock [Member]	Nov. 23, 2011 Mr. Yan Tang [Member]	Nov. 23, 2011 Mr. Yong Li [Member]	Nov. 23, 2011 Mr. Xiaoliang Lei [Member]	Nov. 23, 2011 Mr. Zhiwei Li [Member]	Dec. 31, 2014 Exclusive Technology Consulting and Management Services Agreement [Member]	Dec. 31, 2014 Business Operations Agreement [Member]	Aug. 31, 2014 Exclusive Cooperation Agreements and Supplemental Agreements [Member]	Dec. 31, 2014 Momo HK [Member]	Dec. 31, 2014 Beijing Momo IT [Member]	Dec. 31, 2014 VIE "Beijing Momo" [Member] CNY	Jul. 07, 2011 VIE "Beijing Momo" [Member] Mr. Yan Tang [Member]	Jul. 07, 2011 VIE "Beijing Momo" [Member] Mr. Yong Li [Member]	Jul. 07, 2011 VIE "Beijing Momo" [Member] Mr. Xiaoliang Lei [Member]	Jul. 07, 2011 VIE "Beijing Momo" [Member] Mr. Zhiwei Li [Member]	Dec. 31, 2014 Beijing Momo and Chengdu Momo [Member] USD ($)	Dec. 31, 2013 Beijing Momo and Chengdu Momo [Member] USD ($)	Dec. 31, 2012 Beijing Momo and Chengdu Momo [Member] USD ($)
Variable Interest Entity [Line Items]
Date of Incorporation	Nov. 23, 2011																			Dec. 05, 2011	Mar. 09, 2012	Jul. 07, 2011
Share capital				$ 15,000
Percentage ownership in share capital													65.00%	20.00%	8.00%	7.00%
Capital contribution percentage, subsidiaries																							65.00%	20.00%	8.00%	7.00%
Percentage of economic ownership																				100.00%	100.00%
Ordinary shares, voting rights							One vote per share	Ten votes per share
Ordinary shares conversion basis	Each Class B ordinary share is convertible into one Class A ordinary share at any time by the holder thereof, while Class A ordinary shares are not convertible to Class B ordinary shares under any circumstances.
Ordinary shares, new issues					45,688,888	45,688,888			36,800,000	36,800,000	8,888,888	8,888,888
Convertible preferred stock shares converted									200,718,811	200,718,811
Maximum call option agreement threshold value																						500,000
Effective years of agreement																	10 years	10 years	10 years
Service fee																											$ 35,188,000	$ 3,356,000	$ 0
Percentage of VIEs revenues to the consolidated net revenues	100.00%	100.00%	0.00%
Percentage of VIEs assets to the consolidated total assets	5.20%	7.00%
Percentage of VIEs liability to the consolidated total liabilities	55.60%	81.30%
Number of consolidated VIE's assets that are collateral for the VIE's obligations	0
VIEs creditors having recourse to general credit of the Company	0
Number of terms under arrangement with VIEs to provide financial support	0

Organization and Principal Activities - Schedule of Subsidiaries, VIE and VIE's Subsidiary (Detail)	12 Months Ended
	Dec. 31, 2014
Variable Interest Entity [Line Items]
Date of Incorporation	Nov. 23, 2011
Momo HK [Member]
Variable Interest Entity [Line Items]
Date of Incorporation	Dec. 05, 2011
Place of Incorporation	Hong Kong
Percentage of economic ownership	100.00%
Beijing Momo IT [Member]
Variable Interest Entity [Line Items]
Date of Incorporation	Mar. 09, 2012
Place of Incorporation	PRC
Percentage of economic ownership	100.00%
Momo BVI [Member]
Variable Interest Entity [Line Items]
Date of Incorporation	Mar. 05, 2014
Place of Incorporation	BVI
Percentage of economic ownership	100.00%
Momo US [Member]
Variable Interest Entity [Line Items]
Date of Incorporation	Mar. 07, 2014
Place of Incorporation	US
Percentage of economic ownership	100.00%
VIE "Beijing Momo" [Member]
Variable Interest Entity [Line Items]
Date of Incorporation	Jul. 07, 2011
Place of Incorporation	PRC
VIE Subsidiary "Chengdu Momo" [Member]
Variable Interest Entity [Line Items]
Date of Incorporation	May 09, 2013
Place of Incorporation	PRC

Organization and Principal Activities - Schedule of Amounts and Balances of VIE Included in Consolidated Financial Statements After Elimination of Intercompany Balances and Transactions (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Variable Interest Entity [Line Items]
Cash and cash equivalents	$ 450,968	$ 55,374	$ 18,539	$ 1,118
Accounts receivable, net of allowance for doubtful accounts of $nil and $nil as of December 31, 2013 and 2014, respectively	7,038	1,935
Prepaid expenses and other current assets	8,009	1,204
Total current assets	466,015	58,711
Property and equipment, net	9,936	3,363
Rental deposits	793
Long term investments	1,760	951
Total assets	478,504	63,025
Accounts payable	5,900	344
Deferred revenue	16,348	3,714
Accrued expenses and other current liabilities	9,415	1,508
Total current liabilities	38,113	5,566
Total liabilities	38,113	5,566
Net revenues	44,755	3,129
Net (loss) profit	(25,415)	(9,326)	(3,839)
VIE "Beijing Momo" [Member]
Variable Interest Entity [Line Items]
Cash and cash equivalents	9,867	861
Accounts receivable, net of allowance for doubtful accounts of $nil and $nil as of December 31, 2013 and 2014, respectively	7,038	1,935
Prepaid expenses and other current assets	5,306	435
Total current assets	22,211	3,231
Property and equipment, net	1,318	1,189
Rental deposits	312
Long term investments	809
Total assets	24,650	4,420
Accounts payable	3,728	125
Deferred revenue	16,348	3,714
Accrued expenses and other current liabilities	1,100	684
Total current liabilities	21,176	4,523
Total liabilities	21,176	4,523
Net revenues	44,755	3,129
Net (loss) profit	32,945	(2,179)	(2,292)
Net cash (used in) provided by operating activities	40,383	(2,956)	(3,005)
Net cash used in investing activities	(1,921)	(723)	(1,039)
Net cash used in financing activities	$ 0	$ 0	$ 0

Organization and Principal Activities - Schedule of Amounts and Balances of VIE Included in Consolidated Financial Statements After Elimination of Intercompany Balances and Transactions (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Variable Interest Entity [Line Items]
Allowance for doubtful accounts	$ 0	$ 0
VIE "Beijing Momo" [Member]
Variable Interest Entity [Line Items]
Allowance for doubtful accounts	$ 0	$ 0

Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014 Transactions	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounting Policies [Line Items]
Allowance for doubtful accounts	$ 0	$ 0
Cash and cash equivalents	450,968,000	55,374,000	18,539,000	1,118,000
Equity method investment, description	Investee companies in which the Group has equity interest over 50%, but the noncontrolling shareholders have substantive rights to participate in significant operating and financing decisions are accounted for using the equity method.
Net revenues recognized	44,755,000	3,129,000
Number of advertising barter transactions engaged during the period	1
Advertising Barter Transactions, description	The Group engaged in one advertising barter transaction with an independent counterparty, for which the Group shall display the counterparty’s brand or product promotion information on its own platform in exchange for advertising to be displayed on the counterparty’s advertising media. The fair value of this transaction was not determinable due to the lack of the Group’s similar historical practice. Therefore, the advertising barter transaction shall be recorded based on the carrying amount of the advertising surrendered, which is the estimated cost to be incurred.
Subsidies received	0	330,000	0
Other operating income	26,000	0	0
Value added tax incurred	5,436,000	392,000	0
Value added tax rate	6.72%	6.72%	6.72%
Significant unrecognized tax benefits	0	0	0
Interest related to penalties	0	0	0
Advertising expense	27,408,000	1,162,000	139,000
Minimum [Member]
Accounting Policies [Line Items]
Percentage of ownership, equity method investment	20.00%
Maximum [Member]
Accounting Policies [Line Items]
Percentage of ownership, equity method investment	50.00%
Membership Subscription [Member]
Accounting Policies [Line Items]
Contract period, minimum	1 month
Contract period, maximum	1 year
Net revenues recognized	29,756,000	2,808,000	0
Mobile Games [Member]
Accounting Policies [Line Items]
Net revenues recognized	11,237,000	92,000	0
Number of games	3
Mobile Games [Member] \| Minimum [Member]
Accounting Policies [Line Items]
Estimated usage life of product/service	45 days
Mobile Games [Member] \| Maximum [Member]
Accounting Policies [Line Items]
Estimated usage life of product/service	69 days
Paid Emoticons [Member]
Accounting Policies [Line Items]
Net revenues recognized	1,787,000	217,000	0
Estimated usage life of product/service	180 days
Credit Concentration Risk [Member] \| Accounts Receivable [Member] \| Minimum [Member]
Accounting Policies [Line Items]
Concentration risk, percentage	10.00%	10.00%
User Concentration Risk [Member] \| Accounts Receivable [Member]
Accounting Policies [Line Items]
Number of users accounted for 10% or more of total revenues	0	0
User Concentration Risk [Member] \| Accounts Receivable [Member] \| Minimum [Member]
Accounting Policies [Line Items]
Concentration risk, percentage	10.00%	10.00%
User Concentration Risk [Member] \| Revenues [Member]
Accounting Policies [Line Items]
Number of users accounted for 10% or more of total revenues	0	0	0
User Concentration Risk [Member] \| Revenues [Member] \| Minimum [Member]
Accounting Policies [Line Items]
Concentration risk, percentage	10.00%	10.00%	10.00%
China, Yuan Renminbi
Accounting Policies [Line Items]
Cash and cash equivalents	$ 20,181,000	$ 3,723,000

Significant Accounting Policies - Schedule of Third-Party Payment Channels Accounting Receivables (Detail) (Accounts Receivable [Member], Credit Concentration Risk [Member])	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Third-party Payment Channel A [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	8.00%	69.00%
Third-party Payment Channel B [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	34.00%	24.00%
Third-party Payment Channel C [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	26.00%	6.00%

Significant Accounting Policies - Schedule of Concentration of Revenue (Detail) (GameD [Member], Revenues [Member], Product Concentration Risk [Member])	12 Months Ended
	Dec. 31, 2014
GameD [Member] \| Revenues [Member] \| Product Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	14.00%

Significant Accounting Policies - Schedule of Estimated Useful Lives of Property and Equipment (Detail)	12 Months Ended
	Dec. 31, 2014
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	3 years
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	5 years
Leasehold Improvement [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	Shorter of the lease term or estimated useful lives
Minimum [Member] \| Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	3 years
Maximum [Member] \| Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	5 years

Accounts Receivable, Net - Schedule of Accounts Receivable, Net (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Receivables [Abstract]
Accounts receivable	$ 7,038	$ 1,935
Less: allowance for doubtful accounts	0	0
Accounts receivable, net	$ 7,038	$ 1,935

Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Advance to game developers	$ 2,894	$ 77
VAT input	2,173	281
Deferred platform commission cost	1,878	315
Prepaid expenses	416
Interest receivable	368
Prepaid rental expenses	35	114
Advance to advertisement suppliers	3	58
Rental deposit	2	308
Others	240	51
Prepaid expenses and other current assets	$ 8,009	$ 1,204

Long Term Investments - Summary of Equity and Cost Method Investments (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014 Shanghai Touch Future Network Technology Co., Ltd. [Member]	Dec. 31, 2014 Shanghai Shuanglang Technology Co., Ltd [Member]	Jul. 25, 2014 Shanghai Shuanglang Technology Co., Ltd [Member]	Dec. 31, 2014 Smartisan Technology Co., Ltd. [Member]	Dec. 31, 2013 Smartisan Technology Co., Ltd. [Member]
Investment [Line Items]
Equity method investment			$ 483
Cost method investments				326	326	951	951
Long term Investments	$ 1,760	$ 951

Long Term Investments - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014 Smartisan Technology Co., Ltd. [Member]	Dec. 31, 2013 Smartisan Technology Co., Ltd. [Member]	Apr. 27, 2013 Smartisan Technology Co., Ltd. [Member]	Dec. 31, 2014 Shanghai Shuanglang Technology Co., Ltd [Member]	Jul. 25, 2014 Shanghai Shuanglang Technology Co., Ltd [Member]	Dec. 03, 2014 Shanghai Touch Future Network Technology Co., Ltd. [Member]
Investment [Line Items]
Percentage of ownership						12.00%		10.00%	20.00%
Cost method investment, total cash consideration						$ 951,000
Cost method investment, total cash consideration				951,000	951,000		326,000	326,000
Equity method investment, total cash consideration									483,000
Impairment on investments	$ 0	$ 0	$ 0

Property and Equipment, Net - Schedule of Property and Equipment, Net (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Less: accumulated depreciation	$ (3,794)	$ (989)
Exchange difference	84	(21)
Total	9,936	3,363
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	9,753	3,358
Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,282	270
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	35	36
Leasehold Improvement [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 2,576	$ 709

Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Payables and Accruals [Abstract]
Accrued payroll and welfare	$ 3,693	$ 838
Accrued Professional services fee	2,984
Payable for advertisement	1,670	172
Deferred government subsidy	330	330
Accrued rental expense	266
Other tax payables	258	72
Others	214	96
Total	$ 9,415	$ 1,508

- Definition

Carrying value as of the balance sheet date of obligations incurred and payable for real and property taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References+ Details

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for advertising of the entity's goods and services. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References+ Details

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References+ Details

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for contractual rent under lease arrangements. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References+ Details

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References+ Details

Fair Value - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments at fair value	$ 0	$ 0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments at fair value	$ 0	$ 0

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
Income Taxes - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Contingency [Line Items]
Taxable income	$ (25,415,000)	$ (9,326,000)	$ (3,839,000)
Income tax expense	0	0	0
Significant unrecognized tax benefits	0	0	0
Interest related to penalties	0	0	0
Significant impact on the unrecognized tax benefits for next twelve months	0	0	0
Earliest Tax Year [Member]
Income Tax Contingency [Line Items]
Tax years subject to tax audits	2013
Latest Tax Year [Member]
Income Tax Contingency [Line Items]
Tax years subject to tax audits	2014
Momo US [Member]
Income Tax Contingency [Line Items]
Tax loss carry forward	1,559,000
Tax loss carry forward period	20 years
Momo HK [Member]
Income Tax Contingency [Line Items]
Tax loss carry forward	200,000
Beijing Momo IT, Beijing Momo and Chengdu Momo [Member]
Income Tax Contingency [Line Items]
Tax loss carry forward	9,974,000
Beijing Momo IT, Beijing Momo and Chengdu Momo [Member] \| Earliest Tax Year [Member]
Income Tax Contingency [Line Items]
Tax loss carry forward, expiration date	Dec. 31, 2016
Beijing Momo IT, Beijing Momo and Chengdu Momo [Member] \| Latest Tax Year [Member]
Income Tax Contingency [Line Items]
Tax loss carry forward, expiration date	Dec. 31, 2019
United States [Member] \| Momo US [Member]
Income Tax Contingency [Line Items]
Taxable income	0
Income tax expense	$ 0
Hong Kong [Member] \| Beneficial Owner [Member] \| Minimum [Member]
Income Tax Contingency [Line Items]
Equity interest in a PRC-resident enterprise	25.00%
Hong Kong [Member] \| Momo HK [Member]
Income Tax Contingency [Line Items]
Profit tax rate	16.50%
PRC [Member]
Income Tax Contingency [Line Items]
Withholding income tax rate for dividends distributed by the PRC subsidiaries	10.00%
PRC statutory tax rate	25.00%	25.00%	25.00%
PRC [Member] \| Beneficial Owner [Member]
Income Tax Contingency [Line Items]
Withholding income tax rate for dividends distributed by the PRC subsidiaries	5.00%
PRC [Member] \| Beijing Momo IT [Member]
Income Tax Contingency [Line Items]
Percentage of exempt tax rate	12.50%
Effective income tax rate	25.00%	25.00%	25.00%
PRC [Member] \| Beijing Momo IT [Member] \| Stage One [Member]
Income Tax Contingency [Line Items]
Tax exemption period	2 years
PRC [Member] \| Beijing Momo IT [Member] \| Stage Two [Member]
Income Tax Contingency [Line Items]
Tax exemption period	3 years
PRC [Member] \| Other Entities [Member]
Income Tax Contingency [Line Items]
Effective income tax rate	25.00%

Income Taxes - Components of Group's Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current deferred tax assets:
Advertising expense		$ 145
Accrued payroll	916	209
Accrued expenses		28
Less: valuation allowance	(916)	(382)
Current deferred tax assets, net	0	0
Non-current deferred tax assets:
Advertising expense	3,863
Net operating tax losses carry-forward	3,068	2,905
Less: valuation allowance	(6,931)	(2,905)
Non-current deferred tax assets, net	$ 0	$ 0

Income Taxes - Schedule of Reconciliation between Income Taxes Expense (Benefit) to Loss before Income Taxes and Actual Provision for Income Taxes (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes And Tax Related [Line Items]
Net loss before provision for income tax	$ (25,415,000)	$ (9,326,000)	$ (3,839,000)
Income tax benefit at statutory tax rate	(6,354,000)	(2,332,000)	(960,000)
Permanent differences	99,000	(285,000)	(90,000)
Change in valuation allowance	4,560,000	2,355,000	842,000
Effect of income tax rate difference in other jurisdictions	1,695,000	262,000	208,000
Provision for income tax	$ 0	$ 0	$ 0
PRC [Member]
Income Taxes And Tax Related [Line Items]
PRC statutory tax rate	25.00%	25.00%	25.00%

Ordinary Shares - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended												0 Months Ended	1 Months Ended			0 Months Ended	1 Months Ended	0 Months Ended	1 Months Ended				0 Months Ended	12 Months Ended				0 Months Ended	1 Months Ended
	Sep. 12, 2012	Dec. 31, 2014	Nov. 28, 2014	Apr. 22, 2014	Dec. 31, 2013	Oct. 08, 2013	Sep. 12, 2012	Jun. 13, 2012	Jun. 11, 2012	Apr. 30, 2012	Apr. 12, 2012	Nov. 23, 2011	Dec. 16, 2014 Class A Common Stock [Member]	Dec. 31, 2014 Class A Common Stock [Member]	Dec. 16, 2014 Class A Common Stock [Member]	Nov. 28, 2014 Class A Common Stock [Member]	Dec. 16, 2014 Class A Common Stock [Member] IPO [Member]	Dec. 31, 2014 Class A Common Stock [Member] IPO [Member]	Dec. 16, 2014 Class A Common Stock [Member] Private Placement [Member]	Dec. 31, 2014 Class A Common Stock [Member] Private Placement [Member]	Dec. 31, 2014 Class B Common Stock [Member]	Nov. 28, 2014 Class B Common Stock [Member]	Nov. 28, 2014 Undesignated Ordinary Shares [Member]	Apr. 22, 2014 Common Stock [Member]	Dec. 31, 2014 Common Stock [Member]	Dec. 31, 2013 Common Stock [Member]	Dec. 31, 2012 Common Stock [Member]	Dec. 31, 2011 Common Stock [Member]	Apr. 22, 2014 Dividend Declared [Member] Common Stock [Member]	May 31, 2014 Dividend Paid [Member] Common Stock [Member]
Class of Stock [Line Items]
Ordinary shares, shares authorized			1,000,000,000	799,281,189		835,675,688	371,684,330	366,789,830	426,747,470		446,545,450	500,000,000		800,000,000		800,000,000					100,000,000	100,000,000	100,000,000
Ordinary shares, shares issued					147,000,000					147,000,000		147,000,000		280,869,740							96,886,370
Ordinary shares, par value												$ 0.0001		$ 0.0001							$ 0.0001
Shares authorized				1,000,000,000		1,000,000,000					500,000,000
Convertible redeemable preferred shares, shares authorized				200,718,811		164,324,312					53,454,550
Stock split ratio for ordinary shares	10
Ordinary shares, shares outstanding					147,000,000									280,869,740							96,886,370				377,756,110	147,000,000	147,000,000	147,000,000
Number of shares, Outstanding					58,187,500									8,807,571							48,443,185
Number of shares donated to the company																								15,651,589
Dividend amount																													$ 64,494	$ 58,044
Dividend payable date																														2014-05
Amount due to ordinary shareholders		$ 6,450		$ 6,450
Ordinary shares, new issues													45,688,888	45,688,888			36,800,000	36,800,000	8,888,888	8,888,888					45,688,888
Convertible preferred stock shares converted to ordinary shares															200,718,811

Convertible Redeemable Participating Preferred Shares - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended										1 Months Ended		12 Months Ended				0 Months Ended	1 Months Ended		12 Months Ended												1 Months Ended		0 Months Ended						1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014 Series A-1 and Series A-2 Convertible Redeemable Participating Preferred Shares [Member]	Dec. 31, 2013 Series A-1 and Series A-2 Convertible Redeemable Participating Preferred Shares [Member]	Dec. 31, 2012 Series A-1 and Series A-2 Convertible Redeemable Participating Preferred Shares [Member]	Dec. 31, 2014 Series A-3 Convertible Redeemable Participating Preferred Shares [Member]	Dec. 31, 2013 Series A-3 Convertible Redeemable Participating Preferred Shares [Member]	Dec. 31, 2012 Series A-3 Convertible Redeemable Participating Preferred Shares [Member]	Dec. 31, 2014 Series A-3 Convertible Redeemable Participating Preferred Shares [Member] Dividend Declared [Member]	Jan. 31, 2013 Series B Convertible Redeemable Participating Preferred Shares [Member]	Jul. 31, 2012 Series B Convertible Redeemable Participating Preferred Shares [Member]	Dec. 31, 2014 Series B Convertible Redeemable Participating Preferred Shares [Member]	Dec. 31, 2013 Series B Convertible Redeemable Participating Preferred Shares [Member]	Dec. 31, 2012 Series B Convertible Redeemable Participating Preferred Shares [Member]	Dec. 31, 2014 Series B Convertible Redeemable Participating Preferred Shares [Member] Dividend Declared [Member]	Apr. 22, 2014 Series A-1 Convertible Redeemable Participating Preferred Shares [Member]	Jan. 31, 2013 Series A-1 Convertible Redeemable Participating Preferred Shares [Member]	Jul. 31, 2012 Series A-1 Convertible Redeemable Participating Preferred Shares [Member]	Dec. 31, 2014 Series A-1 Convertible Redeemable Participating Preferred Shares [Member] Dividend Declared [Member]	Dec. 31, 2013 Series B Preferred Stock Redesignated From Series A-1 Preferred Stock [Member]	Dec. 31, 2012 Series B Preferred Stock Redesignated From Series A-1 Preferred Stock [Member]	Dec. 31, 2014 Series C Convertible Redeemable Participating Preferred Shares [Member]	Dec. 31, 2013 Series C Convertible Redeemable Participating Preferred Shares [Member]	Dec. 31, 2014 Series C Convertible Redeemable Participating Preferred Shares [Member] Dividend Declared [Member]	Dec. 31, 2014 Series D Convertible Redeemable Participating Preferred Shares [Member]	Dec. 31, 2014 Series D Convertible Redeemable Participating Preferred Shares [Member] Dividend Declared [Member]	Dec. 31, 2014 Series A-2 Convertible Redeemable Participating Preferred Shares [Member] Dividend Declared [Member]	Dec. 31, 2014 Preferred Stock Other Than Series B Preferred Stock Redesignated From Series A-1 Preferred Stock[Member].	Dec. 31, 2013 Preferred Stock Other Than Series B Preferred Stock Redesignated From Series A-1 Preferred Stock[Member].	Dec. 31, 2012 Preferred Stock Other Than Series B Preferred Stock Redesignated From Series A-1 Preferred Stock[Member].	Jan. 31, 2013 Investor [Member] Series B Convertible Redeemable Participating Preferred Shares [Member]	Jul. 31, 2012 Investor [Member] Series B Convertible Redeemable Participating Preferred Shares [Member]	Apr. 12, 2012 Private Placement [Member] Series A-1 and Series A-2 Convertible Redeemable Participating Preferred Shares [Member]	Jun. 11, 2012 Private Placement [Member] Series A-3 Convertible Redeemable Participating Preferred Shares [Member]	Jul. 13, 2012 Private Placement [Member] Series B Convertible Redeemable Participating Preferred Shares [Member]	Oct. 08, 2013 Private Placement [Member] Series C Convertible Redeemable Participating Preferred Shares [Member]	Apr. 22, 2014 Private Placement [Member] Series D Convertible Redeemable Participating Preferred Shares [Member]	Dec. 16, 2014 IPO [Member] Class A Common Stock [Member]	Dec. 31, 2014 IPO [Member] Class A Common Stock [Member]
Temporary Equity [Line Items]
Convertible redeemable participating preferred stock, shares issued																																10,079,373	4,894,500	53,454,550	19,797,980	55,063,140	36,008,642	43,693,356
Aggregate proceeds from issuance of convertible redeemable participating preferred shares																																$ 4,280	$ 1,400	$ 2,100	$ 4,000	$ 18,006	$ 45,000	$ 211,750
Convertible preferred stock shares converted																		10,079,373	4,894,500																				200,718,811	200,718,811
Convertible redeemable participating preferred stock, issued per conversion											10,079,373	4,894,500
Convertible redeemable participating preferred stock, issued price per share																																$ 0.425	$ 0.286
Deem dividend	57,663	8,120	3,093	30,910	524	363	544	509	265				3,116	5,652	2,465		30,293				2,766	1,361	5,596	1,435		17,497			57,663	5,354	1,732
Repurchase of preferred shares																	7,298,857
Repurchase of preferred shares, value																	30,750
Preferred shares, dividend rate										8.00%						8.00%				8.00%					8.00%		8.00%	8.00%
Convertible participating redeemable preferred shares, subscription price										$ 0.20204										$ 0.04714					$ 1.2497		$ 4.84627	$ 0.13469
Percentage of distributions shall be made to preferred shareholders in event of liquidation				150.00%			100.00%						100.00%										130.00%			130.00%
Percentage of redemption price on initial purchase price				150.00%			125.00%						125.00%										125.00%			125.00%
Initial conversion ratio	1
Qualified IPO, minimum proceeds	$ 50,000

Share-Based Compensation - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended						0 Months Ended	12 Months Ended						0 Months Ended	1 Months Ended	0 Months Ended	1 Months Ended	12 Months Ended	1 Months Ended	12 Months Ended			0 Months Ended								12 Months Ended			1 Months Ended	12 Months Ended	0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Apr. 30, 2012	Nov. 23, 2011	Dec. 31, 2014 Class A Common Stock [Member]	May 15, 2014 Non-Vested Restricted Shares [Member]	Dec. 31, 2014 Non-Vested Restricted Shares [Member]	Dec. 31, 2013 Non-Vested Restricted Shares [Member]	Dec. 31, 2012 Non-Vested Restricted Shares [Member]	May 15, 2014 Non-Vested Restricted Shares [Member]	Apr. 30, 2012 Non-Vested Restricted Shares [Member]	Dec. 31, 2011 Non-Vested Restricted Shares [Member]	May 15, 2014 Non-Vested Restricted Shares [Member] Share-based Compensation Award, Tranche One [Member]	Apr. 30, 2012 Non-Vested Restricted Shares [Member] Share-based Compensation Award, Tranche One [Member]	May 15, 2014 Non-Vested Restricted Shares [Member] Share-based Compensation Award, Tranche Two [Member]	Apr. 30, 2012 Non-Vested Restricted Shares [Member] Share-based Compensation Award, Tranche Two [Member]	Dec. 31, 2014 RSUs [Member]	Nov. 30, 2014 2012 Plan [Member]	Dec. 31, 2014 2012 Plan [Member]	Dec. 31, 2013 2012 Plan [Member]	Dec. 31, 2012 2012 Plan [Member]	Oct. 29, 2014 2012 Plan [Member] Employees [Member]	Mar. 01, 2014 2012 Plan [Member] Employees [Member]	Oct. 10, 2013 2012 Plan [Member] Employees [Member]	Nov. 01, 2012 2012 Plan [Member] Employees [Member]	Mar. 01, 2014 2012 Plan [Member] Executive Officer [Member]	Oct. 10, 2013 2012 Plan [Member] Executive Officer [Member]	Mar. 01, 2014 2012 Plan [Member] Consultants [Member]	Nov. 01, 2012 2012 Plan [Member] Consultants [Member]	Dec. 31, 2014 2012 Plan [Member] Non Employee Stock Options [Member]	Dec. 31, 2013 2012 Plan [Member] Non Employee Stock Options [Member]	Dec. 31, 2012 2012 Plan [Member] Non Employee Stock Options [Member]	Nov. 30, 2014 2014 Plan [Member] Class A Common Stock [Member]	Dec. 31, 2014 2014 Plan [Member] Class A Common Stock [Member]	Dec. 11, 2014 2014 Plan [Member] RSUs [Member] Share-based Compensation Award, Tranche Three [Member]	Dec. 11, 2014 2014 Plan [Member] RSUs [Member] Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum aggregate number of shares issued																				44,758,220
Number of share options granted																			0				2,963,500	444,866	8,580,000	9,050,000	4,048,660	5,500,000	100,000	100,000							40,001
Exercise price of share options granted																				$ 0.0854	$ 0.1404	$ 0.0327	$ 0.0002	$ 0.1404	$ 0.1404	$ 0.0327	$ 0.1404	$ 0.1404	$ 0.1404	$ 0.0327
Share based compensation arrangements vesting period																2 years	36 months						4 years	4 years	4 years	4 years	4 years	4 years	4 years	4 years						6 months
Maximum aggregate number of shares issued																																		14,031,194
Increase in number of shares reserved for future issuances																																			1.50%
Number of shares reserved for future issuances, description																																			Beginning in 2017, the number of shares reserved for future issuances under the 2014 Plan will be increased by a number equal to 1.5% of the total number of outstanding shares on the last day of the immediately preceding calendar year, or such lesser number of Class A ordinary shares as determined by the Company’s board of directors, on the first day of each calendar year during the term of the 2014 Plan.
Options vested																				8,080,000
Options expected to vest																				22,640,026
Options expected to vest, weighted-average exercise price																				$ 0.1003
Options expected to vest, Aggregate intrinsic value																		$ 240		$ 133,569	$ 7,227	$ 1,775
Share-based compensation	6,638	963	592					335	368	535								18		5,848	586	56									437	9	1
Unrecognized compensation expense								232										322		36,127
Shares recognition period								1 year 3 months 18 days										11 months 12 days		3 years 5 months 9 days
Weighted average remaining contractual term options outstanding																				8 years 7 months 24 days
Ordinary shares, shares issued		147,000,000		147,000,000	147,000,000	280,869,740					131,348,411	147,000,000
Share based payment vesting percentage														50.00%	25.00%	25.00%	75.00%																			50.00%
Modification of vesting of shares, description								The Company shall be entitled to repurchase 50% and 25% of such shares in the case that founders terminate their employments with the Company before April 17, 2015 and during the period from April 17, 2015 to April 17, 2016, respectively, at a price of US$0.0001 per share or the lowest price permitted under applicable laws. Therefore, the Company considered that 50% of the total restricted shares were vested immediately on the amendment date and 25% shall be vested annually on April 17 in the next two years ending April 17, 2016. Before the modification date, May 15, 2014, there were 131,348,411 ordinary shares, of which 45,937,500 were unvested restricted shares. As the result of modification, 19,736,705 vested ordinary shares were classified to unvested restricted shares on the modification date and the corresponding compensation costs for these unvested restricted shares were amortized over the remaining service period.
Unvested restricted shares		58,187,500				8,807,571		57,250,756	58,187,500	94,937,500	45,937,500		147,000,000
Unvested restricted shares, modification							19,736,705	19,736,705
Ordinary shares, par value					$ 0.0001	$ 0.0001					$ 0.0001
Fair value of the restricted shares, per share								$ 0.01										$ 8.51
Fair value of the restricted shares								1,470										340
Weighted average remaining contractual terms																		11 months 12 days
Intrinsic value

Share-Based Compensation - Summary of Stock Options Granted (Detail) (2012 Plan [Member], USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
2012 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options, Outstanding beginning balance	23,230,000	9,150,000
Number of options, Granted	7,557,026	14,080,000	9,150,000
Number of options, Exercised	0	0	0
Number of options, Forfeited	(67,000)
Number of options, Outstanding ending balance	30,720,026	23,230,000	9,150,000
Weighted average exercise price per option, Outstanding beginning balance	$ 0.0980	$ 0.0327
Weighted average exercise price per option, Granted	$ 0.0854	$ 0.1404	$ 0.0327
Weighted average exercise price per option, Exercised	$ 0	$ 0	$ 0
Weighted average exercise price per option, Forfeited	$ 0.1258
Weighted average exercise price per option, Outstanding ending balance	$ 0.0948	$ 0.0980	$ 0.0327
Weighted average fair value per option at grant date, Outstanding beginning balance	$ 0.2412	$ 0.1600
Weighted average fair value per option at grant date, Granted	$ 4.9994	$ 0.2939	$ 0.1600
Weighted average fair value per option at grant date, Exercised	$ 0	$ 0	$ 0
Weighted average fair value per option at grant date, Forfeited	$ 0.9649
Weighted average fair value per option at grant date, Outstanding ending balance	$ 1.4101	$ 0.2412	$ 0.1600

Share-Based Compensation - Summary of Share Options Outstanding (Detail) (2012 Plan [Member], USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, Number outstanding	30,720,026	23,230,000	9,150,000
Options outstanding, Weighted average remaining contractual term	8 years 7 months 24 days
Options outstanding, Exercise price per option	$ 0.0948	$ 0.0980	$ 0.0327
Options outstanding, Aggregate intrinsic value	$ 181,407
Options exercisable, Number exercisable	8,080,000
Options exercisable, Aggregate intrinsic value	47,838
November 1, 2012 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, Number outstanding	9,150,000
Options outstanding, Weighted average remaining contractual term	7 years 10 months 2 days
Options outstanding, Exercise price per option	$ 0.0327
Options outstanding, Aggregate intrinsic value	54,601
Options exercisable, Number exercisable	4,575,000
Options exercisable Exercise price per option	$ 0.0327
Options exercisable, Aggregate intrinsic value	27,300
October 10, 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, Number outstanding	14,020,000
Options outstanding, Weighted average remaining contractual term	8 years 9 months 11 days
Options outstanding, Exercise price per option	$ 0.1404
Options outstanding, Aggregate intrinsic value	82,152
Options exercisable, Number exercisable	3,505,000
Options exercisable Exercise price per option	$ 0.1404
Options exercisable, Aggregate intrinsic value	20,538
March 1, 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, Number outstanding	4,593,526
Options outstanding, Weighted average remaining contractual term	9 years 1 month 28 days
Options outstanding, Exercise price per option	$ 0.1404
Options outstanding, Aggregate intrinsic value	26,916
October 29, 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, Number outstanding	2,956,500
Options outstanding, Weighted average remaining contractual term	9 years 9 months 29 days
Options outstanding, Exercise price per option	$ 0.0002
Options outstanding, Aggregate intrinsic value	$ 17,738

Share-Based Compensation - Schedule of Assumptions Used to Estimate Fair Value of Stock Options Granted (Detail) (2012 Plan [Member], USD $)	12 Months Ended
	Dec. 31, 2014
November 1, 2012 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate of return	2.31%
Contractual term	10 years
Volatility	61.70%
Dividend yield	0.00%
Exercise price	$ 0.0327
October 10, 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate of return	3.09%
Contractual term	10 years
Volatility	54.40%
Dividend yield	0.00%
Exercise price	$ 0.1404
March 1, 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate of return	3.25%
Contractual term	10 years
Volatility	53.70%
Dividend yield	0.00%
Exercise price	$ 0.1404
October 29, 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate of return	2.44%
Contractual term	10 years
Volatility	57.50%
Dividend yield	0.00%
Exercise price	$ 0.0002

Share-Based Compensation - Summary of Non-Vested Restricted Share Activity (Detail)	0 Months Ended	12 Months Ended
	May 15, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares, Outstanding ending balance			58,187,500
Non-Vested Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares, Outstanding beginning balance	45,937,500	58,187,500	94,937,500	147,000,000
Number of shares, Granted		0	0	0
Number of shares, Forfeited			0	0
Number of shares, Modification	19,736,705	19,736,705
Number of shares, Vested		(20,673,449)	(36,750,000)	(52,062,500)
Number of shares, Outstanding ending balance		57,250,756	58,187,500	94,937,500

Share-Based Compensation - Summary of Restricted Share Units Granted (Detail) (RSUs [Member])	12 Months Ended
	Dec. 31, 2014
RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares, Outstanding beginning balance	0
Number of shares, Granted	40,001
Number of shares, Forfeited	0
Number of shares, Vested	0
Number of shares, Outstanding ending balance	40,001

Net Loss Per Share - Calculation of Net Loss Per Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Numerator:
Net loss attributable to Momo Inc	$ (25,415)	$ (9,326)	$ (3,839)
Deemed dividend	(57,663)	(8,120)	(3,093)
Net loss attributable to ordinary shareholders	(83,078)	(17,446)	(6,932)
Net loss per ordinary share attributable to Momo Inc - diluted
Net loss per ordinary share attributable to Momo Inc - diluted	$ (0.97)	$ (0.26)	$ (0.12)
Denominator for computing net loss per share-basic:
Weighted average ordinary shares outstanding used in computing net loss per ordinary share-basic	85,293,775	67,190,411	60,103,654
Denominator for computing net loss per share-diluted:
Weighted average shares outstanding used in computing net loss per ordinary share-diluted	85,293,775	67,190,411	60,103,654
Net loss per ordinary share attributable to Momo Inc - basic
Net loss per ordinary share attributable to Momo Inc - basic	$ (0.97)	$ (0.26)	$ (0.12)
Non-Vested Restricted Shares [Member]
Numerator:
Undistributed earnings	0	0	0
Denominator for computing net loss per share-basic:
Weighted average ordinary shares outstanding used in computing net loss per ordinary share-basic	60,951,591	79,809,589	86,896,346
Series A-1 and Series A-2 Convertible Redeemable Participating Preferred Shares [Member]
Numerator:
Deemed dividend	(30,910)	(524)	(363)
Denominator for computing net loss per share-basic:
Weighted average ordinary shares outstanding used in computing net loss per ordinary share-basic	32,176,676	38,977,742	36,124,555
Net loss per ordinary share attributable to Momo Inc - basic
Net loss per ordinary share attributable to Momo Inc - basic	$ 0.96	$ 0.01	$ 0.01
Series A-3 Convertible Redeemable Participating Preferred Shares [Member]
Numerator:
Deemed dividend	(544)	(509)	(265)
Denominator for computing net loss per share-basic:
Weighted average ordinary shares outstanding used in computing net loss per ordinary share-basic	18,990,997	19,797,980	10,980,847
Net loss per ordinary share attributable to Momo Inc - basic
Net loss per ordinary share attributable to Momo Inc - basic	$ 0.03	$ 0.03	$ 0.02
Series B Convertible Redeemable Participating Preferred Shares [Member]
Numerator:
Deemed dividend	(3,116)	(5,652)	(2,465)
Undistributed earnings	0	0	0
Denominator for computing net loss per share-basic:
Weighted average ordinary shares outstanding used in computing net loss per ordinary share-basic	67,182,243	69,513,767	28,012,996
Net loss per ordinary share attributable to Momo Inc - basic
Net loss per ordinary share attributable to Momo Inc - basic	$ 0.05	$ 0.08	$ 0.09
Series C Convertible Redeemable Participating Preferred Shares [Member]
Numerator:
Deemed dividend	(5,596)	(1,435)
Undistributed earnings	0	0	0
Denominator for computing net loss per share-basic:
Weighted average ordinary shares outstanding used in computing net loss per ordinary share-basic	34,540,898	7,280,436
Net loss per ordinary share attributable to Momo Inc - basic
Net loss per ordinary share attributable to Momo Inc - basic	$ 0.16	$ 0.20
Series A Convertible Redeemable Participating Preferred Shares [Member]
Numerator:
Undistributed earnings	0	0	0
Series D Convertible Redeemable Participating Preferred Shares [Member]
Numerator:
Deemed dividend	(17,497)
Undistributed earnings	$ 0	$ 0	$ 0
Denominator for computing net loss per share-basic:
Weighted average ordinary shares outstanding used in computing net loss per ordinary share-basic	28,348,231
Net loss per ordinary share attributable to Momo Inc - basic
Net loss per ordinary share attributable to Momo Inc - basic	$ 0.62

Net Loss Per Share - Summary of Potential Ordinary Shares Outstanding Excluded from Computation of Diluted Net Loss Per Ordinary Share (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential ordinary shares outstanding excluded from the computation of diluted net loss per ordinary share	21,831,082	1,014,557	49,976
Non-Vested Restricted Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential ordinary shares outstanding excluded from the computation of diluted net loss per ordinary share	60,951,591	79,809,589	86,896,346
Series A-1 and Series A-2 Convertible Redeemable Participating Preferred Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential ordinary shares outstanding excluded from the computation of diluted net loss per ordinary share	32,176,676	38,977,742	36,124,555
Series A-3 Convertible Redeemable Participating Preferred Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential ordinary shares outstanding excluded from the computation of diluted net loss per ordinary share	18,990,997	19,797,980	10,980,847
Series B Convertible Redeemable Participating Preferred Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential ordinary shares outstanding excluded from the computation of diluted net loss per ordinary share	67,182,243	69,513,767	28,012,996
Series C Convertible Redeemable Participating Preferred Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential ordinary shares outstanding excluded from the computation of diluted net loss per ordinary share	34,540,898	7,280,436
Series D Convertible Redeemable Participating Preferred Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential ordinary shares outstanding excluded from the computation of diluted net loss per ordinary share	28,348,231

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References+ Details

Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Leases [Abstract]
Lease expiration year	2017
Rental expenses under operating leases	$ 2,995,000	$ 937,000	$ 446,000
Amount of material contingencies during the period	$ 0	$ 0	$ 0

Commitments and Contingencies - Schedule of Future Minimum Payments under Non-Cancellable Operating Leases (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Leases [Abstract]
2015	$ 3,307
2016	1,516
2017	419
2018 and after	0
Total	$ 5,242

Related Party Balances and Transactions - Schedule of Amount Due from Related Party (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Apr. 22, 2014	Dec. 31, 2013
Amount due from a related party-current
Amount due from an ordinary shareholder			$ 198
Amount due to related parties-current
Amount due to ordinary shareholders	$ 6,450	$ 6,450

- Definition

Amounts due from owners or owners with a beneficial interest of more than 10 percent of the voting interests or officers of the company, which are usually due within 1 year (or 1 business cycle).

+ References+ Details

- Definition

Amounts due to recorded owners or owners with a beneficial interest of more than 10 percent of the voting interests or officers of the company. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References+ Details

Segment Information - Components of Revenues (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenue from External Customer [Line Items]
Total revenues	$ 44,755	$ 3,129
Membership Subscription [Member]
Revenue from External Customer [Line Items]
Total revenues	29,756	2,808	0
Mobile Games [Member]
Revenue from External Customer [Line Items]
Total revenues	11,237	92	0
Other Services [Member]
Revenue from External Customer [Line Items]
Total revenues	$ 3,762	$ 229

Statutory Reserves and Restricted Net Assets - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Required minimum percentage of annual appropriations	10.00%
General reserve as a percentage of registered capital up to which after-tax profit shall be transferred	50.00%
Appropriations to statutory reserves	$ 0	$ 0	$ 0
Capital reserves not available for distribution	93,537,000	12,047,000	455,000
Statutory reserves not available for distribution	$ 93,537,000	$ 12,047,000	$ 455,000

- Definition

A segregation of retained earnings which is unavailable for dividend distribution. Includes also retained earnings appropriated for loss contingencies.

+ References+ Details

Subsequent Events - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended			1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 31, 2015 Momo BVI [Member] Subsequent Events [Member]	Jan. 31, 2015 Momo BVI [Member] Subsequent Events [Member] Employees [Member]	Jan. 31, 2015 Momo BVI [Member] Subsequent Events [Member] Executives [Member]
Subsequent Event [Line Items]
Subsequent event, description	The Group has evaluated events subsequent to the balance sheet date of December 31, 2014 through April 20, 2015, the date on which the financial statements were available to be issued.
Number of options, Granted					1,750,000	5,000,000
Exercise price of share options granted					$ 0.10	$ 0.11
Options, vesting period					4 years	4 years
Weighted average fair value per option at grant date, Granted					$ 0.055	$ 0.052
Share-based compensation	$ 6,638	$ 963	$ 592	$ 400

Consolidated Statements of Changes in Equity (Deficit) (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Statement of Stockholders' Equity [Abstract]
Issuance of ordinary shares, Offering cost	$ 4,361

Segment Information - Additional Information (Detail)	12 Months Ended
Segment Information - Additional Information (Detail)	Dec. 31, 2014 Segment
Segment Reporting [Abstract]
Number of operating segments	1

Employee Benefit Plan - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Postemployment Benefits [Abstract]
Provisions for employee benefits	$ 2,635	$ 978	$ 311

Related Party Balances and Transactions - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013
Related Party Transactions [Abstract]
Interest charges	$ 0