View Filing Data

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

An impairment change 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

Intangible assets


Copyright		1 year
License		3.2-10 years
Technology		3 years
User base		5 years
Trade name		10 years

Impairment of long-lived assets with finite lives

Goodwill

two-step

In performing the

two-step

Convertible senior notes

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

The Company adopted ASC Topic 606, Revenue from Contracts with Customers

(“

Topic

606”)

from January 1, 2018, using the modified retrospective method. Revenues for the years ended December 31, 2018 and 2019 are presented under

Topic

For the years ended December 31, 2017, 2018 and 2019, the Group’s revenue is reported net of discounts, value added tax and surcharges.

The following table provides information about disaggregated revenue by types, including a reconciliation of the disaggregated revenue with the Group’s reportable segments:


	For the year ended December 31, 2019
	Momo		Tantan		QOOL
	RMB		RMB		RMB
Live video service		12,448,131		—		—
Value-added services		2,846,057		1,259,906		—
Mobile marketing		331,822		—		—
Mobile games		92,451		—		—
Other services		22,354		—		14,368

Total		15,740,815		1,259,906		14,368


	For the year ended December 31, 2018
	Momo		Tantan		QOOL
	RMB		RMB		RMB
Live video service		10,709,491		—		—
Value-added services		1,465,152		417,998		—
Mobile marketing		500,321		—		—
Mobile games		130,392		—		—
Other services		7,065		—		178,002

Total		12,812,421		417,998		178,002


	For the year ended December 31, 2017
	Momo		Tantan		QOOL
	RMB		RMB		RMB
Live video service		7,429,906		—		—
Value-added services		695,798		—		—
Mobile marketing		514,279		—		—
Mobile games		241,388		—		—
Other services		3,452		—		1,567
Total		8,884,823		—		1,567

(a)

Live video service

pre-determined

non-refundable

non-refundable,

consumed at a

point-in-time

after the virtual items are consumed.

The Group does not provide any right of return and does not provide any other credit or incentive to its users.

(b)

Value-added services

(c)

Mobile marketing

The Group provides advertising and marketing solutions to customers for promotion of their brands and conduction of effective marketing activities through its mobile application.

Display-based mobile marketing services

Performance-based mobile marketing services

The Group also enables advertising customers to place links on its mobile platform on a

pay-for-effectiveness

The Group’s mobile marketing revenues are recognized net of agency rebates, if applicable. Agency rebates have not been material for the years ended December 31, 201

, 201

and 201

(d)

Mobile games

The Group operates mobile games including both self-developed and licensed mobile games and generates mobile game revenues from the sales of

in-game

virtual currencies or virtual items.

(e)

Other services

Revenues from other services in the year ended December 31, 2019 mainly consisted of film distribution service, film promotion service and music service revenues.

Practical expedients and exemptions

Contract balances

material

impairment

Cost of revenues

Government subsidies

income amounted to RMB

141,688

, RMB

223,995

and RMB

255,750

for the years ended December

2017

2018

and

2019

, resp

ectively.

Research and development expenses

Value added taxes ("VAT")

Value added taxes (“VAT”)

Income taxes

than-not

that a portion of or all of the deferred tax assets will not be realized.

The impact of an uncertain income tax position on the income tax return is recognized at the largest amount that is more-likely

Foreign currency translation and change in reporting currency

are recorded in other comprehensive income (loss).

, respectively.

Leases

The Group adopted ASU 2016-02, Leases (Topic 842) (“

Topic 842

Advertising expenses

Total advertising expenses incurred were RMB

1,036,053

, RMB

1,236,167

and RMB

1,960,002

for the years ended December

2017

2018

and

2019

, respectively, and have been included in sales and marketing expenses in the consolidated statements of operations.

Comprehensive income

Comprehensive income includes net income, unrealized gain or loss on

available-for-sale

investments and foreign currency translation adjustments. Comprehensive income is reported in the consolidated statements of comprehensive income.

Share-based compensation

Share-based compensation with cash settlement features is classified as liabilities. The percentage of the fair value that is r

eco

specific

period

, but may fully vest

upon

Share awards issued to consultants are measured at the grant

date fair value and recognized over the period the services are provided.

catch-up

adjustment in the period of change.

Share-based compensation

Earnings per share

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

as-if-converted

method.

Recent accounting pronouncements adopted

In February 2016, the Financial Accounting Standards Board (“FASB”) issued Topic 842.

The guidance supersedes existing guidance on accounting for leases with the main difference being that operating leases are to be recorded in the statement of financial position as

right-of-use

In June 2018, the FASB issued ASU No.

2018-07,

Compensation—Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting to simplify the accounting for share-based payments to nonemployees (“ASU

2018-07”)

2018-07

on January 1, 2019 using the grant

date fair value to measure equity-classified nonemployee awards. The adoption of ASU

2018-07

did not have a significant impact on the Group’s consolidated financial statements.

Recent accounting pronouncements not yet adopted

In August 2018, the FASB issued ASU No.

2018-13,

Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement (“ASU

2018-13”)

2018-13

on its consolidated financial statements.

In March 2019, the FASB issued ASU

2019-02,

Improvements to Accounting for Costs of Films and License Agreements for Program Materials (“ASU

2019-02”)

2019-02

requires that an entity test a film or license agreement for program material within the scope of ASC

920-350

for impairment at a film group level when the film or license agreement is predominantly monetized with other films and/or license agreements. The presentation and disclosure requirements in ASU

2019-02

Revenues [Member]

Concentration of credit risk and revenue

Concentration of revenue

No user or customer accounted for 10% or more of net revenues for the years ended December 31, 2017, 2018 and 2019, respectively.

Accounts Receivable [Member]

Concentration of credit risk and revenue

Concentration of credit risk

Financial instruments that potentially expose the Group to concentration of credit risk consist primarily of cash and cash equivalents,

short-term deposits, long-

term deposits and accounts receivable. The Group places their cash with financial institutions with high-credit ratings and quality.

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


	As of December 31,
	2018			2019
A		14	%		26	%
B		5	%		12	%
C		12	%		9	%

Users or customers accounting for 10% or more of accounts receivables is as follows:


	As of December 31,
	2018			2019
D		59	%		0	%

Organization and Principal Activities (Tables)

12 Months Ended

Dec. 31, 2019

Text Block [Abstract]

Schedule of Subsidiaries, VIEs and VIEs' Subsidiaries

As of December 31, 2019, details of the Company’s major subsidiaries, VIEs and VIEs’ subsidiaries are as follows:

Major subsidiaries

Momo Technology HK Company Limited (“Momo HK”)

Beijing Momo Information Technology Co., Ltd. (“Beijing Momo IT”)

Qool Media HongKong Limited (“QOOL HK”)

Tantan Limited (“Tantan”)

Tantan Hong Kong Limited (“Tantan HK”)

Tantan Technology (Beijing) Co., Ltd. (“Tantan Technology”)

QOOL Media Inc. (“QOOL Inc.”)

QOOL Media Technology (Tianjin) Co., Ltd. (“QOOL Media”)

Major VIEs

Beijing Momo Technology Co., Ltd. (“Beijing Momo”) *

QOOL Media (Tianjin) Co., Ltd. (“QOOL Tianjin”) *

Tantan Culture Development (Beijing) Co., Ltd. (“Tantan Culture”) *

Major VIEs’ subsidiaries

Chengdu Momo Technology Co., Ltd. (“Chengdu Momo”) *

Tianjin Heer Technology Co., Ltd. (“Tianjin Heer”) *

Loudi Momo Technology Co., Ltd. (“Loudi Momo”) *

Momo Pictures Co., Ltd. (“Momo Pictures”) *

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


	As of December 31,
	2018		2019
	RMB		RMB
Cash and cash equivalents		1,502,395		1,147,848
Short- t erm deposits		—		800,000
Accounts receivable, net of allowance for doubtful accounts of RMB nil and RMB12,209 as of December 31, 201 8 and 201 9 , respectively		719,606		259,250
Amount due from related parties		—		4,382
Prepaid expenses and other current assets		425,974		416,862

Total current assets		2,647,975		2,628,342

Right-of-use assets, net		—		39,693
Property and equipment, net		72,539		42,668
Intangible assets		42,821		37,089
Rental deposits		11,619		10,570
Long-term investments		447,465		495,905
Deferred tax assets		52,887		34,514
Other non-current assets		67,480		43,970
Goodwill		22,130		22,130

Total assets		3,364,916		3,354,881

Accounts payable		549,173		611,471
Deferred revenue		441,392		497,166
Accrued expenses and other current liabilities		304,363		244,759
Amounts due to related parties		43,213		29,554
Lease liabilities due within one year		—		6,830
Income tax payable		113,733		122,403

Total current liabilities		1,451,874		1,512,183

Deferred tax liabilities		10,705		9,272
Lease liabilities		—		17,466

Total liabilities		1,462,579		1,538,921


	For the years ended December 31,
	2017			2018			2019
	RMB			RMB			RMB
Net revenues		8,886,390			13,408,421			17,001,337
Net income		4,890,438			6,292,183			8,511,991
Net cash provided by operating activities		4,997,183			5,913,709			9,125,496
Net cash used in investing activities		(174,333	)		(151,546	)		(881,828	)
Net cash provided by financing activities		490			—			11,000

- 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, 2019

Estimated Useful Lives

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

Identifiable Intangible Assets Amortized over their estimated useful lives using the straight line method

Separately identifiable intangible assets that have determinable lives continue to be amortized over their estimated useful lives using the straight-line method as follows:


Copyright		1 year
License		3.2-10 years
Technology		3 years
User base		5 years
Trade name		10 years

Components of Revenues

The following table provides information about disaggregated revenue by types, including a reconciliation of the disaggregated revenue with the Group’s reportable segments:


	For the year ended December 31, 2019
	Momo		Tantan		QOOL
	RMB		RMB		RMB
Live video service		12,448,131		—		—
Value-added services		2,846,057		1,259,906		—
Mobile marketing		331,822		—		—
Mobile games		92,451		—		—
Other services		22,354		—		14,368

Total		15,740,815		1,259,906		14,368


	For the year ended December 31, 2018
	Momo		Tantan		QOOL
	RMB		RMB		RMB
Live video service		10,709,491		—		—
Value-added services		1,465,152		417,998		—
Mobile marketing		500,321		—		—
Mobile games		130,392		—		—
Other services		7,065		—		178,002

Total		12,812,421		417,998		178,002


	For the year ended December 31, 2017
	Momo		Tantan		QOOL
	RMB		RMB		RMB
Live video service		7,429,906		—		—
Value-added services		695,798		—		—
Mobile marketing		514,279		—		—
Mobile games		241,388		—		—
Other services		3,452		—		1,567
Total		8,884,823		—		1,567

Accounts Receivable [Member]

Schedules of Concentration of Risk, by Risk Factor

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


	As of December 31,
	2018			2019
A		14	%		26	%
B		5	%		12	%
C		12	%		9	%

Users or customers accounting for 10% or more of accounts receivables is as follows:


	As of December 31,
	2018			2019
D		59	%		0	%

- 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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13537-108611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13531-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6327-108592

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 21
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6442-108592

+ Details

Acquisitions (Tables)

12 Months Ended

Dec. 31, 2019

Business Combinations [Abstract]

Schedule of Total Consideration for Acquisition

The consideration consisted of RMB3,930,246 of cash, of which RMB3,845,900 was paid as of December 31, 201

. The consideration also included 5,328,853 newly issued Class A ordinary shares of the Company which were fully issued as of the acquisition date.


Cash consideration			3,930,246
Fair value of ordinary shares issued			784,215
Total consideration			4,714,461

Schedule of Purchase Price Allocation to Assets Acquired and Liabilities Assumed as of the Date of Acquisition


	Indicated Value			Estimated useful lives
	RMB
Net tangible assets:
Cash and cash equivalents and short term investment		154,671
Accounts receivable		20,079
Other current asset		22,833
Property and equipment, net		46,160
Other non-current asset		3,030
Intangible assets
Trade name		640,600			10 years
Technology		26,100			3 years
User base		342,500			5 years
Total assets		1,255,973
Accounts payable		(21,037	)
Other current liabilities		(262,533	)
Deferred tax liabilities		(252,300	)
Goodwill		3,994,358
Total consideration		4,714,461

Summary of Operation Attributable to Acquisition

The following information summarizes the results of operation attributable to the acquisition included in the Group’s consolidated statement of operations since the acquisition date:


	Year ended December 31, 2018
	RMB
Net revenue		417,998
Net loss		519,206

Schedule of Pro Froma Result from Operations

The following unaudited pro forma information summarizes the results of operations of the Group for the years ended December 31, 201

and 201


	Years ended December 31,
	201 7		201 8
	(Unaudited)		(Unaudited)
	RMB		RMB
Pro forma net revenue		8,887,543		13,511,439

Pro forma net income attributable to ordinary shareholders of Momo Inc.		1,627,664		2,383,646

Pro forma net income per ordinary share - basic		4.13		5.86
Pro forma net income per ordinary share - diluted		3.92		5.50

- Definition

Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate.

+ References + Details

Prepaid Expenses and Other Current Assets (Tables)

12 Months Ended

Dec. 31, 2019

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,
	2018		2019
	RMB		RMB
Deposit at third-party payment channels (i)		258,039		190,037
Input VAT (ii)		69,075		107,879
Interest receivable		87,057		105,450
Advance to suppliers (iii)		94,100		80,419
Corporate lending receivable (iv)		—		40,000
Deferred platform commission cost		36,189		35,922
Prepaid income tax and other expenses		55,084		19,738
Others		21,435		19,555

		620,979		599,000

(i)

(ii)	Input VAT mainly occurred from the purchasing of goods or other services, property and equipment and advertising activities. It is subject to verification by related tax authorities before offsetting the VAT output.

(iii)

Advance to suppliers were primarily for advertising fees and related service fees.

(iv)	Corporate lending receivable is the loan to a third-party entity, which is mature in less than one year. The annual interest rate is 10%, which can be waived if certain conditions are met.

Long-Term Investments (Tables)

12 Months Ended

Dec. 31, 2019

Long-term Investments [Abstract]

Summary of Equity and Cost Method Investments


	As of December 31,
	2018		2019
	RMB		RMB
Equity method investments
Jingwei Chuangteng (Hangzhou) L.P. (i)		64,441		73,418
Beijing Autobot Venture Capital L.P. (ii)		57,392		21,873
Hangzhou Aqua Ventures Investment Management L.P. (iii)		105,289		106,704
Chengdu Tianfu Qianshi Equity Investment Partnership L.P. (iv)		20,586		27,465
Others ( viii )		21,632		22,320
Equity securities without readily determinable fair values
Hunan Qindao Cultural Spread Ltd. (v)		30,000		30,000
Hangzhou Faceunity Technology Limited (vi)		70,000		70,000
Haining Yijiayi Culture Co., Ltd . (vii)		25,000		25,000
Others ( vii i )		53,125		119,125

		447,465		495,905

The Group performed impairment analysis for equity method investments, equity securities without readily determinable fair values periodically. Impairment loss

of RMB30,085, RMB43,200 and RMB15,711 w

ere

recorded for long-term investments during the years ended December 31, 2017, 2018 and 2019, respectively.

(i)

and 201

. The Group recognized its share of partnership profit in Jingwei of RMB11,677, RMB16,168 and RMB8,977 during the year ended December 31, 2017, 2018 and 2019, respectively.

(ii)

and

RMB2,230

during the year

ended December 31, 2017 and 2018, respectively. The Group recognized its share of partnership loss in Autobot of RMB35,520 during the year ended December 31, 2019.

(iii)

(iv)

. The Group recognized its share of partnership profit in Tianfu of RMB nil

and

RMB8,586

during the years ended December 31, 2017 and 2018, respectively. The Group recognized its share of partnership loss in

ianfu

of RMB2,121 during the year ended December 31, 2019.

(v)

On June 8, 2016, the Group entered into a share purchase agreement to acquire 16.0%

equity

of Hunan Qindao Cultural Spread Ltd. (“Qindao”) for a total consideration of RMB30,000, which was fully paid off as of December 31, 2017.

(vi)

in-substance

common stock, it was accounted as an equity securities without readily determinable fair values and measured at fair value using the measurement alternative.

(vii)

On August 2, 2018, the Group invested in Haining Yijiayi Culture Co., Ltd (“Yijiayi”) and acquired 5% equity for a total consideration of RMB25,000, which had been paid as of December 31, 201

. As the investment was neither a debt security nor an

in-substance

common stock, it was accounted as an equity securities without readily determinable fair values and measured at fair value using the measurement alternative.

(viii)

Others represent equity method investments or equity securities without readily determinable fair values that are individually insignificant.

- Definition

Tabular disclosure of investment.

+ References + Details

Property and Equipment, Net (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Schedule of Property and Equipment, Net

Property and equipment, net consisted of the following:


	As of December 31,
	2018			2019
	RMB			RMB
Computer equipment		513,448			623,482
Office equipment		115,048			150,048
Vehicles		3,599			3,599
Leasehold improvement		94,340			99,671
Less: accumulated depreciation		(338,868	)		(530,439	)
Exchange difference		(35	)		(16	)
		387,532			346,345

- Definition

Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.

+ References + Details

Intangible Assets, Net (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

Intangible assets, net consisted of the following:


	As of December 31,
	2018			2019
	RMB			RMB
Trade name		687,164			695,789
Active user		367,396			372,007
Technology		27,997			28,349
License		52,433			52,433
Game copyright		2,170			2,170
Less: accumulated amortization and impairment		(99,080	)		(257,034	)
Exchange difference		(1,094	)		(3,411	)

Net book value		1,036,986			890,303

Schedule of Future Amortization Expense

The estimated aggregate amortization expenses for each of the five succeeding fiscal years and thereafter are as follows:


For the year ended December 31,	Amounts
	RMB
20 20		159,162
202 1		152,955
202 2		148,994
202 3		105,593
202 4		74,592
Thereafter		249,007

Total		890,303

- Definition

Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment.

+ References + Details

Goodwill (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill


	As of December 31, 2019
	Momo		Tantan		Total
	RMB		RMB		RMB
Balance, as of January 1, 2018		22,130		—		22,130
Acquisition of Tantan (Note 3)		—		3,994,358		3,994,358
Foreign exchange differences		—		290,341		290,341
Balance, as of December 31, 2018		22,130		4,284,699		4,306,829
Foreign exchange differences		—		53,781		53,781

Balance, as of December 31, 2019		22,130		4,338,480		4,360,610

Accrued Expenses and Other Current Liabilities (Tables)

12 Months Ended

Dec. 31, 2019

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,
	2018		2019
	RMB		RMB
Accrued payroll and welfare		302,117		335,012
Payable for advertisement		254,872		304,954
Balance of users’ virtual accounts		112,488		120,935
Accrued professional services and related service fee		38,415		68,825
Other tax payables		99,964		55,872
VAT payable		9,208		29,975
Others		29,646		70,300

Total		846,710		985,873

Leases (Tables)

12 Months Ended

Dec. 31, 2019

Leases [Abstract]

Summary of operating lease additional information

Total operating lease expense for the year ended December 31, 2019 was

RMB160,791,

including RMB26,848 short-term lease expense. The operating lease expense was recorded in cost and expense on the consolidated statements of operations.


For the Twelve months ended December 31, 2019	Amounts
	RMB
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases		106,288
Non -cash r ight-of-use assets obtained in exchange for new lease obligations:
Operating leases		127,362
Weighted average remaining lease term
Operating leases		1.59
Weighted average discount rate
Operating leases		4.52	%

Summary of future minimum payments under operating leases

As of

December 31, 2019, future minimum payments under operating leases were as follows:


For the year ended December 31,	Amounts
	RMB
2020		141,324
2021		53,769
2022		3,770
Less imputed interest		7,196

Total		191,667

Schedule of Future Minimum Payments Under Non-Cancellable Operating Leases

Future minimum payments under non-cancellable operating leases as of December 31, 2018 were as follows:


For the year ended December 31,	Amounts
	RMB
2019		99,133
2020		82,697
2021		26,980
2022		8,633

Total		217,443

Fair Value (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Schedule of Assets Measured at Fair Value on Recurring Basis


	Fair Value Measured as of December 31,
Description	2018		Quoted Prices in Active Market for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
	RMB		(Level 1)		(Level 2)		(Level 3)
Cash and cash equivalents		2,468,034		2,468,034		—		—
Total		2,468,034		2,468,034		—		—

	Fair Value Measured as of December 31,
Description	2019		Quoted Prices in Active Market for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
	RMB		(Level 1)		(Level 2)		(Level 3)
Cash and cash equivalents		2,612,743		2,612,743		—		—
Total		2,612,743		2,612,743		—		—

- Definition

Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References + Details

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

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,
	2018			2019
	RMB			RMB
Deferred tax assets:
Advertising expense		221,113			239,937
Net operating loss carry-forward		103,060			117,595
Accrued expenses		43,631			26,196
Impairment on long-term investments and game copyright		11,336			14,117
Less: valuation allowance		(321,354	)		(360,781	)
Deferred tax assets, net		57,786			37,064
Deferred tax liabilities:
Intangible assets acquired		259,247			222,576
Deferred tax liabilities, net		259,247			222,576

Schedule of Reconciliation between Income Tax Expense to Income before Income Taxes and Actual Provision for Income Tax

Reconciliation between income tax expense computed by applying the PRC EIT rate of 25% to income before income taxes and the actual provision for income tax is as follows:


	For the years ended December 31,
	2017			2018			2019
	RMB			RMB			RMB
Net income before provision for income tax		2,549,735			3,439,535			3,867,919
PRC statutory tax rate		25	%		25	%		25	%
Income tax expense at statutory tax rate		637,434			859,884			966,980
Permanent differences		(446	)		20,135			24,406
Change in valuation allowance		5,990			98,862			39,427
Effect of income tax rate difference in other jurisdictions		80,085			156,136			257,449
Effect of tax holidays and preferential tax rates		(278,062	)		(435,369	)		(404,461	)

Provision for income tax		445,001			699,648			883,801

Increase in Income Tax Expenses and Net Income Per Share Amounts

If Beijing Momo IT, Chengdu

Momo

and Tantan Technology


	For the years ended December 31,
	2017		2018		2019
	RMB		RMB		RMB
Increase in income tax expenses		278,062		435,369		404,461
Net income per ordinary share attributable to Momo Inc. - basic		4.74		5.85		6.18
Net income per ordinary share attributable to Momo Inc. - diluted		4.50		5.59		5.86

- Definition

Tabular disclosure of the income tax exemptions and reductions which have been granted by taxing authorities for a specified period, applicable term of the exemptions and reductions, estimated dollar value of tax benefits, and per share benefits.

+ References + Details

Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2019

Company Share Incentive Plan [Member]

Summary of Option Activity

The following table summarizes the option activity for the year ended December 31, 201


	Number of options			Weighted average exercise price per option (US$)		Weighted average remaining contractual life (years)		Aggregated intrinsic Value (US$)
Outstanding as of January 1, 201 9		21,783,103			0.0296		7.36		258,030
Granted		5,820,796			0.0002
Exercised		(3,290,330	)		0.0082
Forfeited		(515,862	)		0.0002
Outstanding as of December 31, 201 9		23,797,707			0.0260		7.05		397,993
Exercisable as of December 31, 201 9		12,180,915			0.0506		5.58		203,414

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

The fair value of options granted was estimated on the date of grant using the Black-Sholes pricing model after the Company completed its

initial public offering

, with the following assumptions used for grants during the applicable periods:


	Risk-free interest rate of return			Expected term		Volatility			Dividend yield		Exercise price (US$)
2017		2.47%~2.87	%		6 years		50.7%~54.0	%		—		0.0002
2018		3.16%~3.66	%		6 years		50.0%~50.7	%		—		0.0002
2019		2.45%~3.21	%		6 years		49.0%~50.5	%		—		0.0002

Options classified as Equity Awards | 2018 Plan

Summary of Option Activity

The following table summarizes the option activity for the year ended December 31, 2019:


	Number of options			Weighted average exercise price per option (US$)		Weighted average remaining contractual life (years)		Aggregated intrinsic value (US$)
Outstanding as of December 31, 2018		9,482,930			1.4309		7.45		35,666

Granted		3,414,378			3.8135
Redeemed		(170,118	)		0.1796
Forfeited		(802,107	)		1.1616

Outstanding as of December 31, 2019		11,925,083			2.1490		7.40		34,356

Exercisable as of December 31, 2019		4,797,434			1.0284		6.18		19,197

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

The fair value of each option granted was estimated on the date of grant using the binomial tree 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

(US$)

During the year ended December 31, 2018

3.58

10 years

55.4

—

0.32

5.0

During the year ended December 31, 2019

2.30%~3.50

10 years

54.2%~55.4

—

0.32~5.0

Options classified as Liability Awards | 2018 Plan

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

The fair value of each option granted was estimated using the binomial tree pricing model with the following assumptions used during the applicable periods:

Risk-free

interest

rate of return

Contractual term

Volatility

Dividend yield

Exercise price

(US$)

During the year ended December 31, 2018

3.39%~3.58

10 years

55.4%~55.6

—

0.0004

During the year ended December 31, 2019

2.45%~3.19

10 years

54.2%~55.5

—

0.0004

- Definition

Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

+ References + Details

Net Income Per Share (Tables)

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Calculation of Net Income Per Share

The calculation of net income per share is as follows:


	For the years ended December 31,
	2017		2018		2019
	RMB		RMB		RMB
Numerator:
Net income attributed to ordinary shareholders for computing net income per ordinary share-basic and diluted		2,148,098		2,815,775		2,970,890
Denominator:
Denominator for computing net income per share-basic:
Weighted average ordinary shares outstanding used in computing net income per ordinary share-basic		394,549,323		407,009,875		415,316,627

Denominator for computing net income per share-diluted:
Weighted average shares outstanding used in computing net income per ordinary share-diluted		415,265,078		433,083,643		451,206,091	(i)

Net income per ordinary share attributable to Momo Inc. - basic		5.44		6.92		7.15

Net income per ordinary share attributable to Momo Inc. - diluted		5.17		6.59		6.76

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


	For the years ended December 31,
	2017		2018		2019
Share issuable upon exercise of share options		768,266		1,117,334		902,655
Share issuable upon exercise of RSUs		—		—		45,893

(i)

, an incremental weighted average number of 20,715,755

ordinary shares from the assumed exercise of share options and RSUs were included.

Related Party Balances and Transactions (Tables)

12 Months Ended

Dec. 31, 2019

Schedule of Related Party Transactions

(1)

Amount due from related parties-current


	As of December 31,
	2018		2019
	RMB		RMB
Hunan Qindao Network Media Technology Co., Ltd. (ii)		—		4,382

Total		—		4,382

(ii)	The amount of RMB4,382 as of December 31, 2019 represented the uncollected amounts for the mobile marketing services provided to Hunan Qindao Network Media Technology Co., Ltd.

(2)

Amount due to related parties - current


	As of December 31,
	2018		2019
	RMB		RMB
Hunan Qindao Network Media Technology Co., Ltd. (iii)		43,178		29,596
Amount due to ordinary shareholders (iv)		39,704		—
Others		66		10

Total		82,948		29,606

(iii)

The amount of RMB43,178

and RMB29,596 as of December 31, 2018 and 2019 primarily represented the unpaid revenue sharing of live video service to Hunan Qindao Network Media Technology Co., Ltd.

(iv)	The amount of RMB39,704 as of December 31, 2018 primarily included the unpaid repurchase amount by the Group to its ordinary shareholders , which was fully paid in the year ended December 31, 2019.

(3)

Sales to related parties


	For the years ended December 31,
	2017		2018		2019
	RMB		RMB		RMB
Hunan Qindao Network Media Technology Co., Ltd. (v)		—		—		5,449
Hangzhou Yihong Advertisement Co., Ltd. (v)		17,659		—		—
Hangzhou Alimama Technology Co., Ltd. (v)		2,309		—		—
Guangzhou Aijiuyou Informational Technology Co., Ltd. (vi)		1,242		—		—
Zhejiang Tmall Technology Co., Ltd. (v)		500		—		—
Others		12		—		—

Total		21,722		—		5,449

(v)	The sales to related parties represented mobile marketing services provided.

(vi)	The sales to related parties represented mobile game revenue generated through those game operating companies.

(4)

Purchase from related parties


	For the years ended December 31,
	2017		2018		2019
	RMB		RMB		RMB
Hunan Qindao Network Media Technology Co., Ltd. (vii)		139,406		429,345		497,789
Beijing Shiyue Haofeng Media Co., Ltd. (vii)		—		2,005		2,070
Alibaba Cloud Computing Ltd. (viii)		74,705		—		—
Hunan Qindao Cultural Spread Ltd. (vii)		61,676		—		—
Taobao (China) Software Co., Ltd.		2,283		—		—
Guangzhou Jianyue Information Technology Co., Ltd.		803		—		—

Total		278,873		431,350		499,859

(vii)

The purchases from Hunan Qindao Network Media Technology Co., Ltd., Beijing Shiyue Haofeng Media Co., Ltd. and Hunan Qindao Cultural Spread Ltd. mainly represent the Revenue Sharing.

(viii)

The purchase from Alibaba Cloud Computing Ltd. is mainly related to its cloud computing services.

Segment Information (Tables)

12 Months Ended

Dec. 31, 2019

Segment Reporting [Abstract]

Components of Revenues

Net revenues, operating cost and expenses, operating income, and net income by segment for the years ended

December 31, 2017, 2018 and 2019 were as follows:


	For the year ended December 31, 2017
	Momo			Tantan		QOOL			Consolidated
	RMB			RMB		RMB			RMB
Net revenues:		8,884,823			—		1,567			8,886,390
Cost and expenses:
Cost of revenues		(4,373,377	)		—		—			(4,373,377	)
Research and development		(346,144	)		—		—			(346,144	)
Sales and marketing		(1,457,658	)		—		(9,718	)		(1,467,376	)
General and administrative		(417,866	)		—		(4,139	)		(422,005	)
Total cost and expenses		(6,595,045	)		—		(13,857	)		(6,608,902	)
Other operating income		156,764			—		—			156,764
Income (loss) from operations		2,446,542			—		(12,290	)		2,434,252
Interest income		145,568			—		—			145,568
Impairment loss on long-term investments		(30,085	)		—		—			(30,085	)
Income tax expense		(445,001	)		—		—			(445,001	)
Share of income on equity method investments		39,729			—		—			39,729
Net income (loss)		2,156,753			—		(12,290	)		2,144,463


	For the year ended December 31, 2018
	Momo			Tantan			QOOL			Consolidated
	RMB			RMB			RMB			RMB
Net revenues:		12,812,421			417,998			178,002			13,408,421
Cost and expenses:
Cost of revenues		(6,572,954	)		(174,858	)		(435,085	)		(7,182,897	)
Research and development		(614,064	)		(146,580	)		—			(760,644	)
Sales and marketing		(1,269,493	)		(520,161	)		(22,608	)		(1,812,262	)
General and administrative		(472,057	)		(121,887	)		(46,079	)		(640,023	)

Total cost and expenses		(8,928,568	)		(963,486	)		(503,772	)		(10,395,826	)
Other operating income		252,458			173			1,066			253,697

Income (loss) from operations		4,136,311			(545,315	)		(324,704	)		3,266,292
Interest income		268,583			4,285			78			272,946
Interest expense		(56,503	)		—			—			(56,503	)
Impairment loss on long-term investments		(43,200	)		—			—			(43,200	)
Income tax expense		(716,729	)		21,824			(4,743	)		(699,648	)
Share of income on equity method investments		48,660			—			—			48,660

Net income (loss)		3,637,122			(519,206	)		(329,369	)		2,788,547


	For the year ended December 31, 2019
	Momo			Tantan			QOOL			Consolidated
	RMB			RMB			RMB			RMB
Net revenues:		15,740,815			1,259,906			14,368			17,015,089
Cost and expenses:
Cost of revenues		(8,065,300	)		(415,688	)		(11,108	)		(8,492,096	)
Research and development		(797,471	)		(297,560	)		—			(1,095,031	)
Sales and marketing		(1,521,511	)		(1,162,912	)		(6,401	)		(2,690,824	)
General and administrative		(641,269	)		(851,099	)		(34,914	)		(1,527,282	)

Total cost and expenses		(11,025,551	)		(2,727,259	)		(52,423	)		(13,805,233	)
Other operating income		323,444			—			21,399			344,843

Income (loss) from operations		5,038,708			(1,467,353	)		(16,656	)		3,554,699
Interest income		396,672			10,706			164			407,542
Interest expense		(78,611	)		—			—			(78,611	)
Impairment loss on long-term investments		(15,711	)		—			—			(15,711	)
Income tax expense		(917,265	)		33,464			—			(883,801	)
Share of loss on equity method investments		(23,350	)		—			—			(23,350	)

Net income (loss)		4,400,443			(1,423,183	)		(16,492	)		2,960,768

Organization and Principal Activities - Additional Information (Detail) ¥ in Thousands, $ in Thousands		12 Months Ended
	May 31, 2018 CNY (¥) shares	Dec. 31, 2019 asset_group related_party Term	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017	May 31, 2018 USD ($)
Variable Interest Entity [Line Items]
Date of incorporation		Nov. 23, 2011
Percentage of VIEs revenues to the consolidated net revenues		99.90%	100.00%	100.00%
Percentage of VIEs assets to the consolidated total assets		14.90%	17.70%
Percentage of VIEs liability to the consolidated total liabilities		17.60%	18.40%
Number of consolidated VIEs' assets that are collateral for the VIEs' obligations \| asset_group		0
VIEs creditors having recourse to general credit of the Company \| related_party		0
Number of terms under arrangement with VIEs to provide financial support \| Term		0
Tantan Limited [Member]
Variable Interest Entity [Line Items]
Cash Consideration	¥ 3,930,246		¥ 3,930,246		$ 613,181
Tantan Limited [Member] \| Momo INC [Member]
Variable Interest Entity [Line Items]
Business acquisition percentage ownership	100.00%				100.00%
Class A Common Stock [Member] \| Tantan Limited [Member]
Variable Interest Entity [Line Items]
Business Acquisition , share issued \| shares	5,328,853
Business Operations Agreement [Member]
Variable Interest Entity [Line Items]
Effective years of agreement		10 years

Organization and Principal Activities - Schedule of Amounts and Balances of VIEs Included in Consolidated Financial Statements After Elimination of Intercompany Balances and Transactions (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 CNY (¥)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)	Dec. 31, 2019 USD ($)	Jan. 01, 2019 CNY (¥)
Variable Interest Entity [Line Items]
Cash and cash equivalents	¥ 2,612,743		¥ 2,468,034		$ 375,297
Short-term deposits	12,312,585		8,824,610		1,768,592
Accounts receivable, net of allowance for doubtful accounts of RMB nil and RMB 12,209 as of December 31, 2018 and 2019, respectively	265,155		719,606		38,087
Amount due from related parties	4,382				629
Prepaid expenses and other current assets	599,000		620,979		86,041
Total current assets	15,793,865		12,633,229		2,268,646
Right-of-use assets, net	190,552				27,371	¥ 188,087
Property and equipment, net	346,345		387,532		49,749
Intangible assets	890,303		1,036,986		127,884
Rental deposits	25,028		24,192		3,595
Long-term investments	495,905		447,465		71,232
Deferred tax assets	37,064		57,786		5,324
Other non-current assets	44,009		71,519		6,322
Goodwill	4,360,610		4,306,829	¥ 22,130	626,362
Total assets	22,483,681		18,965,538		3,229,577
Accounts payable	714,323		718,362		102,604
Deferred revenue	503,461		441,892		72,318
Accrued expenses and other current liabilities	985,873		846,710		141,611
Amounts due to related parties	29,606		82,948		4,253
Lease liabilities due within one year	135,169				19,416
Total current liabilities	2,606,754		2,696,276		374,435
Deferred tax liabilities	222,576		259,247		31,971
Lease liabilities	56,498				8,115
Total liabilities	8,764,899		7,942,679		$ 1,258,997
Net revenues	17,015,089		13,408,421	8,886,390
Net income	2,970,890		2,815,775	2,148,098
Net cash provided by operating activities	5,448,886	$ 782,686	3,327,718	2,886,107
Net cash used in investing activities	(4,029,919)	(578,861)	(10,034,004)	(188,174)
Net cash provided by financing activities	(1,273,780)	$ (182,967)	4,687,951	2,833
Beijing Momo Technology Co., Ltd. [Member]
Variable Interest Entity [Line Items]
Cash and cash equivalents	1,147,848		1,502,395
Short-term deposits	800,000
Accounts receivable, net of allowance for doubtful accounts of RMB nil and RMB 12,209 as of December 31, 2018 and 2019, respectively	259,250		719,606
Amount due from related parties	4,382
Prepaid expenses and other current assets	416,862		425,974
Total current assets	2,628,342		2,647,975
Right-of-use assets, net	39,693
Property and equipment, net	42,668		72,539
Intangible assets	37,089		42,821
Rental deposits	10,570		11,619
Long-term investments	495,905		447,465
Deferred tax assets	34,514		52,887
Other non-current assets	43,970		67,480
Goodwill	22,130		22,130
Total assets	3,354,881		3,364,916
Accounts payable	611,471		549,173
Deferred revenue	497,166		441,392
Accrued expenses and other current liabilities	244,759		304,363
Amounts due to related parties	29,554		43,213
Lease liabilities due within one year	6,830		0
Income tax payable	122,403		113,733
Total current liabilities	1,512,183		1,451,874
Deferred tax liabilities	9,272		10,705
Lease liabilities	17,466
Total liabilities	1,538,921		1,462,579
Net revenues	17,001,337		13,408,421	8,886,390
Net income	8,511,991		6,292,183	4,890,438
Net cash provided by operating activities	9,125,496		5,913,709	4,997,183
Net cash used in investing activities	(881,828)		¥ (151,546)	(174,333)
Net cash provided by financing activities	¥ 11,000			¥ 490

Organization and Principal Activities - Schedule of Amounts and Balances of VIEs Included in Consolidated Financial Statements After Elimination of Intercompany Balances and Transactions (Parenthetical) (Detail) - CNY (¥) ¥ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Allowance for doubtful accounts	¥ 12,209	¥ 0
Beijing Momo Technology Co., Ltd. [Member]
Variable Interest Entity [Line Items]
Allowance for doubtful accounts	¥ 12,209	¥ 0

- Definition

Amount of allowance for credit loss on accounts receivable, classified as current.

+ References + Details

Significant Accounting Policies - Additional Information (Detail) ¥ in Thousands, $ in Thousands		12 Months Ended
	Jan. 01, 2019 CNY (¥)	Dec. 31, 2019 CNY (¥) Customer	Dec. 31, 2019 USD ($) Customer	Dec. 31, 2018 CNY (¥) Customer	Dec. 31, 2017 CNY (¥) Customer	Dec. 31, 2019 USD ($)
Accounting Policies [Line Items]
Cash and cash equivalents		¥ 2,612,743		¥ 2,468,034		$ 375,297
Deferred revenue recognized	¥ 441,892
Impairment charges related to contract assets		0
Other operating income		344,843	$ 49,534	253,697	¥ 156,764
Value added tax incurred		1,484,651		1,136,034	812,249
Foreign currency adjustment gain loss		¥ (8,835)	$ (1,269)	198,654	(155,368)
Foreign Currency Exchange difference		Translations of amounts from RMB into US$ for the convenience of the reader were calculated at the noon buying rate of US$1.00 = RMB6.9618 on the last trading day of 2019 (December 31, 2019) representing the certificated exchange rate published by the Federal Reserve Board. No representation is made that the RMB amounts could have been, or could be, converted, realized or settled into US$ at such rate, or at any other rates.	Translations of amounts from RMB into US$ for the convenience of the reader were calculated at the noon buying rate of US$1.00 = RMB6.9618 on the last trading day of 2019 (December 31, 2019) representing the certificated exchange rate published by the Federal Reserve Board. No representation is made that the RMB amounts could have been, or could be, converted, realized or settled into US$ at such rate, or at any other rates.
Foreign currency translation exchange rate		6.9618				6.9618
Advertising expense		¥ 1,960,002		1,236,167	1,036,053
Right-of-use assets, net	188,087	¥ 190,552				$ 27,371
Operating lease, liability	¥ 162,404			217,443
Minimum [Member]
Accounting Policies [Line Items]
Percentage of ownership, equity method investment		20.00%				20.00%
Maximum [Member]
Accounting Policies [Line Items]
Percentage of ownership, equity method investment		50.00%				50.00%
Contracts, original duration		1 year	1 year
Short-term deposits [Member] \| Minimum [Member]
Accounting Policies [Line Items]
Bank deposits maturity		3 months	3 months
Short-term deposits [Member] \| Maximum [Member]
Accounting Policies [Line Items]
Bank deposits maturity		1 year	1 year
Long-term deposits [Member] \| Minimum [Member]
Accounting Policies [Line Items]
Bank deposits maturity		1 year	1 year
Membership Subscription [Member]
Accounting Policies [Line Items]
Contract period, minimum		1 month	1 month
Contract period, maximum		1 year	1 year
Government Subsidies
Accounting Policies [Line Items]
Other operating income		¥ 255,750		¥ 223,995	¥ 141,688
User Concentration Risk [Member] \| Revenues [Member]
Accounting Policies [Line Items]
Number of users or customer accounted for 10% or more of total revenues \| Customer		0	0	0	0
China, Yuan Renminbi
Accounting Policies [Line Items]
Cash and cash equivalents		¥ 2,434,000		¥ 2,008,000

Significant Accounting Policies - Schedule of Third-Party Application Stores and Other Payment Channels Accounting Receivables (Detail) - Accounts Receivable [Member] - Credit Concentration Risk [Member]	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Third-party Payment Channel A [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	26.00%	14.00%
Third-party Payment Channel B [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	12.00%	5.00%
Third-party Payment Channel C [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	9.00%	12.00%
Third-party Payment Channel D [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	0.00%	59.00%

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References + Details

Significant Accounting Policies - Schedule of Estimated Useful Lives of Property and Equipment (Detail)	12 Months Ended
	Dec. 31, 2019
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

- Definition

Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment).

+ References + Details

Significant Accounting Policies - Schedule of Estimated Useful Lives of Intangible Assets (Detail)	12 Months Ended
	Dec. 31, 2019
Copyrights [Member]
Finite-Lived Intangible Liabilities [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year
Technology [Member]
Finite-Lived Intangible Liabilities [Line Items]
Finite-Lived Intangible Asset, Useful Life	3 years
User Base [Member]
Finite-Lived Intangible Liabilities [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years
Trade Names [Member]
Finite-Lived Intangible Liabilities [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years
Minimum [Member] \| Licenses [Member]
Finite-Lived Intangible Liabilities [Line Items]
Finite-Lived Intangible Asset, Useful Life	3 years 2 months 12 days
Maximum [Member] \| Licenses [Member]
Finite-Lived Intangible Liabilities [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years

Significant Accounting Policies - Components of Revenues (Detail) - CNY (¥) ¥ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue From Contract With Customers [Line Items]
Total revenues	¥ 17,015,089	¥ 13,408,421	¥ 8,886,390
Momo Inc [Member]
Revenue From Contract With Customers [Line Items]
Total revenues	15,740,815	12,812,421	8,884,823
Momo Inc [Member] \| Live Video Service [Member]
Revenue From Contract With Customers [Line Items]
Total revenues	12,448,131	10,709,491	7,429,906
Momo Inc [Member] \| Value-added Services [Member]
Revenue From Contract With Customers [Line Items]
Total revenues	2,846,057	1,465,152	695,798
Momo Inc [Member] \| Mobile Marketing [Member]
Revenue From Contract With Customers [Line Items]
Total revenues	331,822	500,321	514,279
Momo Inc [Member] \| Mobile Games [Member]
Revenue From Contract With Customers [Line Items]
Total revenues	92,451	130,392	241,388
Momo Inc [Member] \| Other Services [Member]
Revenue From Contract With Customers [Line Items]
Total revenues	22,354	7,065	3,452
Tantan Limited [Member]
Revenue From Contract With Customers [Line Items]
Total revenues	1,259,906	417,998
Tantan Limited [Member] \| Value-added Services [Member]
Revenue From Contract With Customers [Line Items]
Total revenues	1,259,906	417,998
Qool Inc [Member]
Revenue From Contract With Customers [Line Items]
Total revenues	14,368	178,002	1,567
Qool Inc [Member] \| Other Services [Member]
Revenue From Contract With Customers [Line Items]
Total revenues	¥ 14,368	¥ 178,002	¥ 1,567

Acquisitions - Additional Information (Detail) - Tantan Limited [Member] ¥ in Thousands, $ in Thousands	May 31, 2018 CNY (¥) shares	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)	May 31, 2018 USD ($)
Cash Consideration	¥ 3,930,246		¥ 3,930,246	$ 613,181
Business acquisition cash paid \| ¥		¥ 3,845,900
Class A Common Stock [Member]
Business Acquisition, share issued \| shares	5,328,853
Momo INC [Member]
Business acquisition percentage ownership	100.00%			100.00%

Acquisitions - Schedule of Business Acquisitions Contingent Consideration (Detail) - Tantan Limited [Member] ¥ in Thousands	12 Months Ended
	Dec. 31, 2018 CNY (¥)
Business Acquisition, Contingent Consideration [Line Items]
Cash consideration	¥ 3,930,246
Fair value of ordinary shares issued	784,215
Total consideration	¥ 4,714,461

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References + Details

Acquisitions - Schedule of Recognized Identified Assets and Liabilities Acquired (Detail) ¥ in Thousands	12 Months Ended
	Dec. 31, 2018 CNY (¥)
Finite-Lived Intangible Assets [Line Items]
Goodwill	¥ 3,994,358
Tantan Limited [Member]
Finite-Lived Intangible Assets [Line Items]
Cash and cash equivalents and short term investment	154,671
Accounts receivable	20,079
Other current asset	22,833
Property and equipment, net	46,160
Other non-current asset	3,030
Total assets	1,255,973
Accounts payable	(21,037)
Other current liabilities	(262,533)
Deferred tax liabilities	(252,300)
Goodwill	3,994,358
Total consideration	¥ 4,714,461
Tantan Limited [Member] \| Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets useful life	10 years
Intangible assets	¥ 640,600
Tantan Limited [Member] \| Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets useful life	3 years
Intangible assets	¥ 26,100
Tantan Limited [Member] \| User Base [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets useful life	5 years
Intangible assets	¥ 342,500

Acquisitions - Summary of Operation Attributable to Acquisition (Detail) - CNY (¥) ¥ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net revenue	¥ 17,015,089	¥ 13,408,421	¥ 8,886,390
Net loss	¥ 2,970,890	2,815,775	¥ 2,148,098
Tantan Limited [Member]
Net revenue		417,998
Net loss		¥ 519,206

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669619-108580

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(22))
-URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1B
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669625-108580

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(18))
-URI http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(20))
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

+ Details

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References + Details

Acquisitions - Schedule of Proforma Information of Acquisitions (Detail) - Tantan Limited [Member] - CNY (¥) ¥ / shares in Units, ¥ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Business Combination Segment Allocation [Line Items]
Pro forma net revenue	¥ 13,511,439	¥ 8,887,543
Pro forma net income attributable to ordinary shareholders of Momo Inc.	¥ 2,383,646	¥ 1,627,664
Pro forma net income per ordinary share - basic	¥ 5.86	¥ 4.13
Pro forma net income per ordinary share - diluted	¥ 5.50	¥ 3.92

- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References + Details

- Definition

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References + Details

- Definition

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References + Details

Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Detail)
¥ in Thousands, $ in Thousands

Dec. 31, 2019

CNY (¥)

Dec. 31, 2019

USD ($)

Dec. 31, 2018

CNY (¥)

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

Deposit at third-party payment channels

^[1]

¥ 190,037

¥ 258,039

Input VAT

^[2]

107,879

69,075

Interest receivable

105,450

87,057

Advance to suppliers

^[3]

80,419

94,100

Corporate lending receivable

^[4]

40,000

Deferred platform commission cost

35,922

36,189

Prepaid income tax and other expenses

19,738

55,084

Others

19,555

21,435

Prepaid expenses and other current assets

¥ 599,000

$ 86,041

¥ 620,979

[1]	Deposit at third-party payment channels are mainly the cash deposited in certain third-party payment channels by the Group for the broadcasters and the gift recipients who received the virtual items and other recipients in the value-added service to withdraw their revenue sharing and the customer payment to the Group’s account through the third-party payment channels.
[2]	Input VAT mainly occurred from the purchasing of goods or other services, property and equipment and advertising activities. It is subject to verification by related tax authorities before offsetting the VAT output.
[3]	Advance to suppliers were primarily for advertising fees and related service fees.
[4]	Corporate lending receivable is the loan to a third-party entity, which is mature in less than one year. The annual interest rate is 10%, which can be waived if certain conditions are met.

Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2019
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Line Items]
Annual interest rate	10.00%
Maximum [Member]
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Line Items]
Loan maturity term	1 year

Long-Term Investments - Summary of Equity and Cost Method Investments (Detail)
¥ in Thousands, $ in Thousands

Dec. 31, 2019

CNY (¥)

Dec. 31, 2019

USD ($)

Dec. 31, 2018

CNY (¥)

Sep. 12, 2018

CNY (¥)

Aug. 18, 2015

CNY (¥)

Feb. 13, 2015

CNY (¥)

Long term Investments

¥ 495,905

$ 71,232

¥ 447,465

Hunan Qindao Cultural Spread Ltd. [Member]

^[1]

30,000

Hangzhou Faceunity Technology Limited [Member]

^[2]

70,000

Haining Yijiayi Culture Co Ltd [Member]

^[3]

25,000

Other Equity Securities [Member]

^[4]

119,125

53,125

Jingwei Chuangteng (Hangzhou) L.P. [Member]

^[5]

73,418

64,441

Beijing Autobot Venture Capital L.P. [Member]

21,873

^[6]

57,392

^[6]

¥ 30,000

Hangzhou Aqua Ventures Investment Management L.P. [Member]

106,704

^[7]

105,289

^[7]

¥ 50,000

Chengdu Tianfu Qianshi Equity Lp Investment [Member]

27,465

^[8]

20,586

^[8]

¥ 30,000

Other Equity Method Investments [Member]

^[4]

¥ 22,320

¥ 21,632

[1]	On June 8, 2016, the Group entered into a share purchase agreement to acquire 16.0% equity of Hunan Qindao Cultural Spread Ltd. (“Qindao”) for a total consideration of RMB30,000, which was fully paid off as of December 31, 2017. As the investment was neither a debt security nor an in-substance common stock, it was accounted as an equity securities without readily determinable fair values and measured at fair value using the measurement alternative.
[2]	On January 17, 2018, the Group entered into a preferred share subscription agreement to acquire 10% equity of Hangzhou Faceunity Technology Limited (“Faceunity”) for a total consideration of RMB70,000, which had been paid as of December 31, 2018. As the investment was neither a debt security nor an in-substance common stock, it was accounted as an equity securities without readily determinable fair values and measured at fair value using the measurement alternative.
[3]	On August 2, 2018, the Group invested in Haining Yijiayi Culture Co., Ltd (“Yijiayi”) and acquired 5% equity for a total consideration of RMB25,000, which had been paid as of December 31, 2019. As the investment was neither a debt security nor an in-substance common stock, it was accounted as an equity securities without readily determinable fair values and measured at fair value using the measurement alternative.
[4]	Others represent equity method investments or equity securities without readily determinable fair values that are individually insignificant.
[5]	On January 9, 2015, the Group entered into a partnership agreement to subscribe partnership interest, as a limited partner, in Jingwei Chuangteng (Hangzhou) L.P. (“Jingwei”). According to the partnership agreement, the Group committed to subscribe 4.9% partnership interest in Jingwei for RMB30,000, which had been paid as of December 31, 2017. Due to Jingwei’s further rounds of financing, the Group’s partnership interest was diluted to 2.4% as of December 31, 2018 and 2019. The Group recognized its share of partnership profit in Jingwei of RMB11,677, RMB16,168 and RMB8,977 during the year ended December 31, 2017, 2018 and 2019, respectively.
[6]	On February 13, 2015, the Group entered into a partnership agreement to subscribe partnership interest, as a limited partner, in Beijing Autobot Venture Capital L.P. (“Autobot”). According to the partnership agreement, the Group committed to subscribe 31.9% partnership interest in Autobot for RMB30,000. Autobot had further rounds of financing, of which the Group subscribed for RMB10,000. Due to Autobot’s further round of financing, the Group’s partnership interest was diluted to 26.7% as of December 31, 2017 and 2018. The committed subscription and further round of financing subscription amount, RMB40,000, was paid as of December 31, 2016. The Group recognized its share of partnership profit in Autobot of RMB8,392 and RMB2,230 during the years ended December 31, 2017 and 2018, respectively. The Group recognized its share of partnership loss in Autobot of RMB35,520 during the year ended December 31, 2019.
[7]	On August 18, 2015, the Group entered into a partnership agreement to subscribe partnership interest, as a limited partner, in Hangzhou Aqua Ventures Investment Management L.P. (“Aqua”). According to the partnership agreement, the Group committed to subscribe 42.7% partnership interest for RMB50,000. The committed subscription amount had been fully paid as of December 31, 2016. The Group recognized its share of partnership profit in Aqua of RMB20,709, RMB20,797 and RMB1,415 during the years ended December 31, 2017, 2018 and 2019, respectively.
[8]	On September 12, 2018, the Group entered into a partnership agreement to subscribe partnership interest, as a limited partner, in Chengdu Tianfu Qianshi Equity Investment Partnership L.P. (“Tianfu”). According to the partnership agreement, the Group committed to subscribe 5.1% partnership interest for RMB30,000, of which RMB21,000 had been paid as of December 31, 2019. The Group recognized its share of partnership profit in Tianfu of RMB nil and RMB8,586 during the years ended December 31, 2017 and 2018, respectively. The Group recognized its share of partnership loss in Tianfu of RMB2,121 during the year ended December 31, 2019.

Long-Term Investments - Additional Information (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 CNY (¥)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
Investments, All Other Investments [Abstract]
Impairment loss on long-term investments	¥ 15,711	$ 2,257	¥ 43,200	¥ 30,085

Long-Term Investments - Summary of Equity and Cost Method Investments (Parenthetical) (Detail)
¥ in Thousands, $ in Thousands

1 Months Ended

12 Months Ended

Feb. 13, 2015

CNY (¥)

Dec. 31, 2019

CNY (¥)

Dec. 31, 2019

USD ($)

Dec. 31, 2018

CNY (¥)

Dec. 31, 2017

CNY (¥)

Dec. 31, 2016

CNY (¥)

Sep. 12, 2018

CNY (¥)

Aug. 02, 2018

Jan. 17, 2018

Jun. 08, 2016

Aug. 18, 2015

CNY (¥)

Jan. 09, 2015

Share of income (loss) on equity method investments

¥ (23,350)

$ (3,354)

¥ 48,660

¥ 39,729

Jingwei Chuangteng (Hangzhou) L.P. [Member]

^[1]

¥ 73,418

¥ 64,441

2.40%

4.90%

Share of income (loss) on equity method investments

¥ 8,977

¥ 16,168

11,677

Payment of equity method investment

¥ 30,000

Beijing Autobot Venture Capital L.P. [Member]

¥ 30,000

21,873

^[2]

¥ 57,392

^[2]

Equity method investments, further financing

¥ 10,000

31.90%

26.70%

Share of income (loss) on equity method investments

(35,520)

¥ 2,230

¥ (8,392)

Payment of equity method investment

¥ 40,000

Hangzhou Aqua Ventures Investment Management L.P. [Member]

106,704

^[3]

105,289

^[3]

¥ 50,000

42.70%

Share of income (loss) on equity method investments

1,415

20,797

20,709

Chengdu Tianfu Qianshi Equity Lp Investment [Member]

27,465

^[4]

20,586

^[4]

¥ 30,000

Payments to acquire available-for-sale securities, equity

21,000

5.10%

Share of income (loss) on equity method investments

(2,121)

8,586

Hunan Qindao Cultural Spread Ltd. [Member]

Percentage of shares acquired recorded as available for sale debt security

16.00%

Payments to acquire available-for-sale securities, equity

¥ 30,000

Hangzhou Faceunity Technology Limited [Member]

Percentage of shares acquired recorded as available for sale debt security

10.00%

Share purchase agreement, consideration paid

¥ 70,000

Haining Yijiayi Culture Co Ltd [Member]

Net income attributed to ordinary shareholders for computing net income per ordinary share-basic and diluted | ¥

Business acquisition, equity interests acquired

5.00%

Payment of equity method investment

¥ 25,000

[1]	On January 9, 2015, the Group entered into a partnership agreement to subscribe partnership interest, as a limited partner, in Jingwei Chuangteng (Hangzhou) L.P. (“Jingwei”). According to the partnership agreement, the Group committed to subscribe 4.9% partnership interest in Jingwei for RMB30,000, which had been paid as of December 31, 2017. Due to Jingwei’s further rounds of financing, the Group’s partnership interest was diluted to 2.4% as of December 31, 2018 and 2019. The Group recognized its share of partnership profit in Jingwei of RMB11,677, RMB16,168 and RMB8,977 during the year ended December 31, 2017, 2018 and 2019, respectively.
[2]	On February 13, 2015, the Group entered into a partnership agreement to subscribe partnership interest, as a limited partner, in Beijing Autobot Venture Capital L.P. (“Autobot”). According to the partnership agreement, the Group committed to subscribe 31.9% partnership interest in Autobot for RMB30,000. Autobot had further rounds of financing, of which the Group subscribed for RMB10,000. Due to Autobot’s further round of financing, the Group’s partnership interest was diluted to 26.7% as of December 31, 2017 and 2018. The committed subscription and further round of financing subscription amount, RMB40,000, was paid as of December 31, 2016. The Group recognized its share of partnership profit in Autobot of RMB8,392 and RMB2,230 during the years ended December 31, 2017 and 2018, respectively. The Group recognized its share of partnership loss in Autobot of RMB35,520 during the year ended December 31, 2019.
[3]	On August 18, 2015, the Group entered into a partnership agreement to subscribe partnership interest, as a limited partner, in Hangzhou Aqua Ventures Investment Management L.P. (“Aqua”). According to the partnership agreement, the Group committed to subscribe 42.7% partnership interest for RMB50,000. The committed subscription amount had been fully paid as of December 31, 2016. The Group recognized its share of partnership profit in Aqua of RMB20,709, RMB20,797 and RMB1,415 during the years ended December 31, 2017, 2018 and 2019, respectively.
[4]	On September 12, 2018, the Group entered into a partnership agreement to subscribe partnership interest, as a limited partner, in Chengdu Tianfu Qianshi Equity Investment Partnership L.P. (“Tianfu”). According to the partnership agreement, the Group committed to subscribe 5.1% partnership interest for RMB30,000, of which RMB21,000 had been paid as of December 31, 2019. The Group recognized its share of partnership profit in Tianfu of RMB nil and RMB8,586 during the years ended December 31, 2017 and 2018, respectively. The Group recognized its share of partnership loss in Tianfu of RMB2,121 during the year ended December 31, 2019.

Property and Equipment, Net - Schedule of Property and Equipment, Net (Detail) ¥ in Thousands, $ in Thousands	Dec. 31, 2019 CNY (¥)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 CNY (¥)
Property, Plant and Equipment [Line Items]
Less: accumulated depreciation	¥ (530,439)		¥ (338,868)
Exchange difference	(16)		(35)
Total	346,345	$ 49,749	387,532
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	623,482		513,448
Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	150,048		115,048
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	3,599		3,599
Leasehold Improvement [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	¥ 99,671		¥ 94,340

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References + Details

- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References + Details

- Definition

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References + Details

Property and Equipment, Net - Additional information (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 CNY (¥)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
Property, Plant and Equipment [Abstract]
Depreciation expense	¥ 198,237	$ 28,475	¥ 148,238	¥ 78,885

- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References + Details

Intangible Assets, Net - Schedule of Intangible Assets (Detail) - CNY (¥) ¥ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Liabilities [Line Items]
Less: accumulated amortization and impairment	¥ (257,034)	¥ (99,080)
Exchange difference	(3,411)	(1,094)
Net book value	890,303	1,036,986
Trade Names [Member]
Finite-Lived Intangible Liabilities [Line Items]
Intangible assets, gross	695,789	687,164
Active User [Member]
Finite-Lived Intangible Liabilities [Line Items]
Intangible assets, gross	372,007	367,396
Technology [Member]
Finite-Lived Intangible Liabilities [Line Items]
Intangible assets, gross	28,349	27,997
Licenses [Member]
Finite-Lived Intangible Liabilities [Line Items]
Intangible assets, gross	52,433	52,433
Game copyright [Member]
Finite-Lived Intangible Liabilities [Line Items]
Intangible assets, gross	¥ 2,170	¥ 2,170

Intangible Assets, Net - Additional Information (Detail) - CNY (¥) ¥ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Depreciation expenses and impairment loss	¥ 157,954	¥ 93,030	¥ 6,050

Intangible Assets, Net - Schedule of Future Amortization Expense (Detail) - CNY (¥) ¥ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
2020	¥ 159,162
2021	152,955
2022	148,994
2023	105,593
2024	74,592
Thereafter	249,007
Net book value	¥ 890,303	¥ 1,036,986

Goodwill - Schedule Of Goodwill (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 CNY (¥)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 CNY (¥)
Goodwill [Line Items]
Beginning balance	¥ 4,306,829		¥ 22,130
Goodwill acquired			3,994,358
Foreign exchange differences	53,781		290,341
Ending balance	4,360,610	$ 626,362	4,306,829
Momo Inc [Member]
Goodwill [Line Items]
Beginning balance	22,130		22,130
Ending balance	22,130		22,130
Tantan Limited [Member]
Goodwill [Line Items]
Beginning balance	4,284,699
Goodwill acquired			3,994,358
Foreign exchange differences	53,781		290,341
Ending balance	¥ 4,338,480		¥ 4,284,699

Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Detail) ¥ in Thousands, $ in Thousands	Dec. 31, 2019 CNY (¥)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 CNY (¥)
Payables and Accruals [Abstract]
Accrued payroll and welfare	¥ 335,012		¥ 302,117
Payable for advertisement	304,954		254,872
Balance of users' virtual accounts	120,935		112,488
Accrued professional services and related service fee	68,825		38,415
Other tax payables	55,872		99,964
VAT payable	29,975		9,208
Others	70,300		29,646
Total	¥ 985,873	$ 141,611	¥ 846,710

- 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

Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer.

+ References + Details

- Definition

Carrying value as of the balance sheet date of liabilities incurred through that date and payable for statutory sales and use taxes, including value added tax. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References + Details

Convertible Senior Notes - Additional Information (Detail) - Convertible Senior Notes Due 2025 [Member] $ / shares in Units, ¥ in Thousands, $ in Thousands		1 Months Ended	12 Months Ended
	Jun. 26, 2018 $ / shares	Jul. 31, 2018 USD ($) shares	Dec. 31, 2019 CNY (¥) shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018	Dec. 31, 2019 $ / shares	Jul. 31, 2018 CNY (¥)	Jul. 31, 2018 USD ($) $ / shares
Line of Credit Facility [Line Items]
Aggregate principal amount							¥ 4,985,000	$ 725,000
Debt Conversion, Converted Instrument, Shares Issued \| shares		15.4776	15.7172	15.7172
Conversion price \| $ / shares	$ 45.34					$ 63.62		$ 64.61
Debt conversion premium percentage	42.50%
Convertible senior notes maturity date		Jul. 01, 2025
Principal amount of each convertible note \| $		$ 1,000		$ 1,000
Number of notes converted into company's ADSs			0	0	0
Convertible senior notes interest rate			1.25%
Debt instrument, carrying value			¥ 4,954,352
Unamortized debt issuance costs			¥ 92,953
Debt instrument, effective interest rate			1.61%
Amortization and interest expenses			¥ 78,501

Leases - Summary of Operating Lease Additional Information (Detail) ¥ in Thousands	12 Months Ended
	Dec. 31, 2019 CNY (¥)
Disclosure Of Operating Lease Additional Information [Abstract]
Operating cash flows from operating leases	¥ 106,288
Operating leases	¥ 127,362
Weighted average remaining lease term, Operating leases	1 year 7 months 2 days
Weighted average discount rate, Operating leases	4.52%

- Definition

Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References + Details

Leases - Summary of Future Minimum Payments Under Operating Leases (Detail) ¥ in Thousands	Dec. 31, 2019 CNY (¥)
Leases [Abstract]
Total	¥ 141,324
2021	53,769
2022	3,770
Less imputed interest	7,196
Total	¥ 191,667

Leases - Schedule of Future Minimum Payments Under Non-Cancellable Operating Leases (Detail) - CNY (¥) ¥ in Thousands	Jan. 01, 2019	Dec. 31, 2018
Leases [Abstract]
2019		¥ 99,133
2020		82,697
2021		26,980
2022		8,633
Total	¥ 162,404	¥ 217,443

- Definition

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References + Details

- Definition

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References + Details

- Definition

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References + Details

- Definition

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References + Details

Leases - Additional Information (Detail) - CNY (¥) ¥ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Operating lease expenses	¥ 160,791
Total rental expense	58,861	¥ 78,713
Short-term lease expense	¥ 26,848

Fair Value - Schedule of Assets Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - CNY (¥) ¥ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	¥ 2,612,743	¥ 2,468,034
Total	2,612,743	2,468,034
Quoted Prices in Active Market for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	2,612,743	2,468,034
Total	¥ 2,612,743	¥ 2,468,034

Fair Value - Additional Information (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 CNY (¥)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment loss on assets	¥ 15,711	$ 2,257	¥ 43,200	¥ 30,085
Fair value of notes	4,761,577		3,901,355
Other Cost and Equity Method Investment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment loss on assets	3,211		0
Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment loss on assets	¥ 12,500		¥ 43,200

Income Taxes - Additional Information (Detail) - CNY (¥)		1 Months Ended		12 Months Ended
	Jul. 31, 2019	Oct. 31, 2018	Aug. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Contingency [Line Items]
Income tax rate					21.00%	35.00%
Deferred tax liability				¥ 222,576,000	¥ 259,247,000
Operating loss carry forward				¥ 7,792,000
Operating loss carry forward period				20 years
Tax loss carry backward period				2 years
Percentage of taxable income offset by tax losses				80.00%
Significant unrecognized tax benefit				¥ 0	0	¥ 0
Interest related to penalties				0	0	0
Significant impact on the unrecognized tax benefits for next twelve months				¥ 0	¥ 0	¥ 0
Tantan Limited [Member]
Income Tax Contingency [Line Items]
Percentage of reduced tax rate	15.00%
Inland Revenue, Singapore (IRAS) [Member]
Income Tax Contingency [Line Items]
Income tax rate				17.00%
Operating loss carry forward				¥ 4,823,000
Earliest Tax Year [Member]
Income Tax Contingency [Line Items]
Tax years subject to tax audits					2015
Latest Tax Year [Member]
Income Tax Contingency [Line Items]
Tax years subject to tax audits					2019
PRC [Member]
Income Tax Contingency [Line Items]
Income tax rate				25.00%	25.00%	25.00%
Withholding income tax rate for dividends distributed by the PRC subsidiaries				10.00%
Deferred tax liability				¥ 0
Operating loss carry forward				¥ 265,448,000
Operating loss carry forward period				5 years	5 years
Operating loss carry forward expiration year				2021
PRC [Member] \| High And New Technology Enterprise ("HNTE") [Member]
Income Tax Contingency [Line Items]
Operating loss carry forward period				10 years
PRC [Member] \| Chengdu Momo Technology Company Limited Investment [Member]
Income Tax Contingency [Line Items]
Percentage of reduced tax rate					15.00%
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 Santi Cloud Union Technology Co., Ltd. [Member]
Income Tax Contingency [Line Items]
Percentage of reduced tax rate		15.00%
PRC [Member] \| 2015 - 2016 [Member] \| Beijing Momo Information Technology Co., Ltd. [Member]
Income Tax Contingency [Line Items]
Tax exemption period			2 years
PRC [Member] \| 2017 - 2019 [Member] \| Beijing Momo Information Technology Co., Ltd. [Member]
Income Tax Contingency [Line Items]
Reduced tax rate period			3 years
Percentage of reduced tax rate			12.50%
PRC [Member] \| Other Entities [Member]
Income Tax Contingency [Line Items]
Income tax rate				25.00%	25.00%
Hong Kong [Member]
Income Tax Contingency [Line Items]
Operating loss carry forward				¥ 188,235,000
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] \| The first 2 million Hong Kong dollars of profits [Member]
Income Tax Contingency [Line Items]
Income tax rate				8.25%
Hong Kong [Member] \| Remaining profits [Member]
Income Tax Contingency [Line Items]
Income tax rate				16.50%
US [Member]
Income Tax Contingency [Line Items]
Operating loss carry forward				¥ 77,846,000	¥ 70,055,000

Income Taxes - Components of Group's Deferred Tax Assets and Liabilities (Detail) - CNY (¥) ¥ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Advertising expense	¥ 239,937	¥ 221,113
Net operating loss carry-forward	117,595	103,060
Accrued expenses	26,196	43,631
Impairment on long-term investments and game copyright	14,117	11,336
Less: valuation allowance	(360,781)	(321,354)
Deferred tax assets, net	37,064	57,786
Deferred tax liabilities:
Intangible assets acquired	222,576	259,247
Deferred tax liabilities, net	¥ 222,576	¥ 259,247

Income Taxes - Schedule of Reconciliation between Income Tax Expense to Income before Income Taxes and Actual Provision for Income Tax (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 CNY (¥)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)
Income Taxes And Tax Related [Line Items]
Net income before provision for income tax	¥ 3,867,919	$ 555,593	¥ 3,439,535	¥ 2,549,735
Income tax expense at statutory tax rate	966,980		859,884	637,434
Permanent differences	24,406		20,135	(446)
Change in valuation allowance	39,427		98,862	5,990
Effect of income tax rate difference in other jurisdictions	257,449		156,136	80,085
Effect of tax holidays and preferential tax rates	(404,461)		(435,369)	(278,062)
Provision for income tax	¥ 883,801	$ 126,950	¥ 699,648	¥ 445,001
PRC [Member]
Income Taxes And Tax Related [Line Items]
PRC statutory tax rate	25.00%	25.00%	25.00%	25.00%

Income Taxes - Increase in Income Tax Expenses and Net Income Per Share Amounts (Detail) - CNY (¥) ¥ / shares in Units, ¥ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Increase in income tax expenses	¥ 404,461	¥ 435,369	¥ 278,062
Earnings per share after increase in income tax expenses - basic	¥ 6.18	¥ 5.85	¥ 4.74
Earnings per share after increase in income tax expenses - diluted	¥ 5.86	¥ 5.59	¥ 4.50

Ordinary Shares - Additional Information (Detail)	12 Months Ended
Ordinary Shares - Additional Information (Detail)	Dec. 31, 2019 $ / shares shares	Dec. 31, 2018 ¥ / shares shares	Dec. 31, 2017 shares	Dec. 31, 2019 ¥ / shares shares
Class of Stock [Line Items]
Issuance of ordinary shares in connection with exercise of options and vesting of share units	3,402,830	10,122,318	9,476,874
Class A Common Stock [Member]
Class of Stock [Line Items]
Ordinary shares, shares issued	336,914,844	333,512,014		336,914,844
Ordinary shares, shares outstanding	336,914,844	333,512,014		336,914,844
Ordinary shares, par value \| (per share)	$ 0.0001	¥ 0.0001		¥ 0.0001
Class B Common Stock [Member]
Class of Stock [Line Items]
Ordinary shares, shares issued	80,364,466	80,364,466		80,364,466
Ordinary shares, shares outstanding	80,364,466	80,364,466		80,364,466
Ordinary shares, par value \| (per share)	$ 0.0001	¥ 0.0001		¥ 0.0001

- Definition

Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP).

+ References + Details

Distribution to Shareholders - Additional Information (Detail) $ / shares in Units, $ in Thousands	Mar. 12, 2019 USD ($) $ / shares
Distribution to shareholders [Line Items]
Dividend record date	Apr. 05, 2019
Ex-dividend date	Apr. 04, 2019
Dividend Paid [Member]
Distribution to shareholders [Line Items]
Cash dividend paid \| $	$ 128,607
Dividend payable date	Apr. 30, 2019
American Depository Shares [Member] \| Dividend Declared [Member]
Distribution to shareholders [Line Items]
Cash dividend amount per share	$ 0.62
Common Stock [Member] \| Dividend Declared [Member]
Distribution to shareholders [Line Items]
Cash dividend amount per share	$ 0.31

Share-Based Compensation - Additional Information (Detail) $ / shares in Units, ¥ in Thousands, $ in Thousands							1 Months Ended			12 Months Ended
	Aug. 30, 2019 shares	Apr. 15, 2019 shares	Dec. 12, 2018 shares	May 02, 2018 shares	Mar. 07, 2017 shares	May 17, 2016	Aug. 31, 2018 shares	Jul. 31, 2018 shares	Nov. 30, 2014 shares	Dec. 31, 2019 CNY (¥) shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 CNY (¥)	Dec. 31, 2018 USD ($) $ / shares	Dec. 31, 2017 CNY (¥)	Dec. 31, 2017 USD ($) $ / shares	Dec. 31, 2019 USD ($) $ / shares shares	Mar. 31, 2017 shares	Apr. 30, 2016 shares	Mar. 31, 2015 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vested										12,180,915	12,180,915
Options expected to vest										10,517,170						10,517,170
Options expected to vest, weighted-average exercise price \| $ / shares																$ 0.0002
Options expected to vest, Aggregate intrinsic value \| $													$ 124,415			$ 176,161
Weighted average fair value per option at grant date, Granted \| $ / shares											$ 16.42		$ 17.75		$ 17.41
Total intrinsic value of options exercised \| $											$ 59,423		$ 209,797		$ 154,233
Total fair value of options vested \| $											69,174		$ 59,226		$ 37,979
Share-based compensation										¥ 1,408,232	$ 202,279	¥ 580,813		¥ 334,973
Weighted average remaining contractual term options outstanding										7 years 18 days	7 years 18 days	7 years 4 months 9 days	7 years 4 months 9 days
Number of options, Granted										5,820,796	5,820,796
Tantan Limited [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
The estimated fair value of ordinary shares of Tantan \| $ / shares																$ 5.03
Share split ratio	1-for-5
RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation \| ¥										¥ 10,622		¥ 6,609		4,173
Unrecognized compensation expense \| ¥										¥ 23,808
Weighted average recognition period										2 years 8 months 23 days	2 years 8 months 23 days
2012 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum aggregate number of shares issued										44,758,220						44,758,220
Number of share options granted									0
2014 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation arrangements expiration Period										10 years	10 years
Unrecognized compensation expense \| ¥										¥ 1,178,770
Weighted average recognition period										2 years 7 months 13 days	2 years 7 months 13 days
Weighted average remaining contractual term options outstanding										7 years 18 days	7 years 18 days
2014 Plan [Member] \| Class A Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum aggregate number of shares issued									14,031,194
Increase in number of shares reserved for future issuances										1.50%	1.50%
Number of shares reserved for future issuances, description										Starting from 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.	Starting from 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.
2014 Plan [Member] \| RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, vesting period						4 years
2014 Plan [Member] \| RSUs [Member] \| Independent Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share options granted		130,000		100,000	100,000
2014 Plan [Member] \| Employee and Executives Share Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation \| ¥										¥ 495,256		377,241		286,119
2014 Plan [Member] \| Non Employee Share Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation \| ¥										880		14,360		¥ 44,277
2015 Plan [Member] \| Tantan Limited [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum aggregate number of shares issued	9,039,035																2,793,812	2,000,000	1,000,000
2018 Plan [Member] \| Tantan Limited [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum aggregate number of shares issued	29,818,370							5,963,674
Share based compensation arrangements expiration Period								10 years
Number of shares reserved for issuance, description								the maximum aggregate number of shares which may be issued shall initially be 5,963,674 ordinary shares, plus that number of ordinary shares authorized for issuance under the 2015 Plan, in an amount equal to (i) the number of ordinary shares that were not granted pursuant to the 2015 Plan, plus (ii) the number of ordinary shares that were granted pursuant to the 2015 Plan that have expired without having been exercised in full or have otherwise become unexercisable.
2018 Plan [Member] \| Qool Inc [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share options granted			9,000,000
Share-based compensation \| ¥										10,811		¥ 566
Unrecognized compensation expense \| ¥										¥ 10,314
Weighted average recognition period										11 months 12 days	11 months 12 days
2018 Plan [Member] \| Options classified as Equity Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average remaining contractual term options outstanding										7 years 4 months 24 days	7 years 4 months 24 days	7 years 5 months 12 days	7 years 5 months 12 days
Number of options, Granted										3,414,378	3,414,378
2018 Plan [Member] \| Options classified as Equity Awards \| Tantan Limited [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vested										4,797,434	4,797,434
Options expected to vest										6,129,788						6,129,788
Options expected to vest, weighted-average exercise price \| $ / shares																$ 2.90
Options expected to vest, Aggregate intrinsic value \| $													$ 23,534			$ 13,037
Weighted average fair value per option at grant date, Granted \| $ / shares											$ 3.05		$ 3.00
Total fair value of options vested \| $											$ 24,985		$ 7,600
Share-based compensation \| ¥										¥ 99,635		¥ 94,977
Unrecognized compensation expense \| ¥										¥ 180,170
Weighted average recognition period										2 years 4 months 20 days	2 years 4 months 20 days
Weighted average remaining contractual term options outstanding										7 years 4 months 24 days	7 years 4 months 24 days
2018 Plan [Member] \| Options classified as Liability Awards \| Tantan Limited [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation \| ¥										¥ 791,028		¥ 86,778
2018 Plan [Member] \| Founders [Member] \| Options classified as Liability Awards \| Tantan Limited [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, vesting period							4 years
Number of options, Granted							17,891,025

Share-Based Compensation - Summary of Options Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options, Outstanding beginning balance	21,783,103
Number of options, Granted	5,820,796
Number of options, Exercised	(3,290,330)
Number of options, Forfeited	(515,862)
Number of options, Outstanding ending balance	23,797,707	21,783,103
Number of options, Exercisable	12,180,915
Weighted average exercise price per option, Outstanding beginning balance	$ 0.0296
Weighted average exercise price per option, Granted	0.0002
Weighted average exercise price per option, Exercised	0.0082
Weighted average exercise price per option, Forfeited	0.0002
Weighted average exercise price per option, Outstanding ending balance	0.0260	$ 0.0296
Weighted average exercise price per option, Exercisable	$ 0.0506
Weighted average remaining contractual term options outstanding	7 years 18 days	7 years 4 months 9 days
Weighted average remaining contractual life, Exercisable	5 years 6 months 29 days
Aggregated intrinsic value, Outstanding beginning balance	$ 397,993	$ 258,030
Aggregated intrinsic value, Exercisable	$ 203,414
Options classified as Equity Awards \| 2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options, Outstanding beginning balance	9,482,930
Number of options, Granted	3,414,378
Number of options, Exercised	(170,118)
Number of options, Forfeited	(802,107)
Number of options, Outstanding ending balance	11,925,083	9,482,930
Number of options, Exercisable	4,797,434
Weighted average exercise price per option, Outstanding beginning balance	$ 1.4309
Weighted average exercise price per option, Granted	3.8135
Weighted average exercise price per option, Exercised	0.1796
Weighted average exercise price per option, Forfeited	1.1616
Weighted average exercise price per option, Outstanding ending balance	2.1490	$ 1.4309
Weighted average exercise price per option, Exercisable	$ 1.0284
Weighted average remaining contractual term options outstanding	7 years 4 months 24 days	7 years 5 months 12 days
Weighted average remaining contractual life, Exercisable	6 years 2 months 4 days
Aggregated intrinsic value, Outstanding beginning balance	$ 34,356	$ 35,666
Aggregated intrinsic value, Exercisable	$ 19,197

Share-Based Compensation - Schedule of Assumptions Used to Estimate Fair Value of Stock Options Granted (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
2014 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate of return, minimum	2.45%	3.16%	2.47%
Risk-free interest rate of return, maximum	3.21%	3.66%	2.87%
Contractual term	6 years	6 years	6 years
Volatility, minimum	49.00%	50.00%	50.70%
Volatility, maximum	50.50%	50.70%	54.00%
Dividend yield	0.00%	0.00%	0.00%
Exercise price	$ 0.0002	$ 0.0002	$ 0.0002
2018 Plan \| Options classified as Equity Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate of return, minimum	2.30%
Risk-free interest rate of return		3.58%
Risk-free interest rate of return, maximum	3.50%
Contractual term	10 years	10 years
Volatility, minimum	54.20%
Volatility		55.40%
Volatility, maximum	55.40%
Dividend yield	0.00%	0.00%
2018 Plan \| Options classified as Liability Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate of return, minimum	2.45%	3.39%
Risk-free interest rate of return, maximum	3.19%	3.58%
Contractual term	10 years	10 years
Volatility, minimum	54.20%	55.40%
Volatility, maximum	55.50%	55.60%
Dividend yield	0.00%	0.00%
Exercise price	$ 0.0004	$ 0.0004
2018 Plan \| Minimum [Member] \| Options classified as Equity Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price	0.32	0.32
2018 Plan \| Maximum [Member] \| Options classified as Equity Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price	$ 5.0	$ 5.0

Net Income Per Share - Calculation of Net Income Per Share (Detail)
¥ / shares in Units, ¥ in Thousands

12 Months Ended

Dec. 31, 2019

CNY (¥)

¥ / shares

Dec. 31, 2019

$ / shares

Dec. 31, 2018

CNY (¥)

¥ / shares

Dec. 31, 2017

CNY (¥)

¥ / shares

Numerator:

¥ 2,970,890

¥ 2,815,775

¥ 2,148,098

Denominator for computing net income per share-basic:

Weighted average ordinary shares outstanding used in computing net income per ordinary share-basic

415,316,627

407,009,875

394,549,323

Denominator for computing net income per share-diluted:

Weighted average shares outstanding used in computing net income per ordinary share-diluted

451,206,091

^[1]

433,083,643

415,265,078

Net income per ordinary share attributable to Momo Inc. - basic | (per share)

¥ 7.15

$ 1.03

¥ 6.92

¥ 5.44

Net income per ordinary share attributable to Momo Inc. - diluted | (per share)

¥ 6.76

$ 0.97

¥ 6.59

¥ 5.17

[1]

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References

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+ Details

- Definition

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

+ References

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+ Details

- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References + Details

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References + Details

Net Income Per Share - Summary of Potential Ordinary Shares Outstanding Excluded from Computation of Diluted Net Loss Per Ordinary Share (Detail) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
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	902,655	1,117,334	768,266
RSUs [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	45,893

Net Income Per Share - Additional Information (Detail) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Convertible Note [Member]
Earnings Per Share [Line Items]
Incremental weighted average number of shares	22,701,379	11,251,916
RSUs [Member] \| Share Options [Member]
Earnings Per Share [Line Items]
Incremental weighted average number of shares	13,188,085	14,821,852	20,715,755

Commitments and Contingencies - Additional Information (Detail) - CNY (¥) ¥ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Partnership Interest [Member]
Lease and Investment Commitments [Line Items]
Equity method investments equity contribution obligation	¥ 13,500	¥ 47,500

Related Party Balances and Transactions - Schedule of Amount Due from Related Parties-current (Detail) - Dec. 31, 2019
¥ in Thousands, $ in Thousands

CNY (¥)

USD ($)

Amount due from related parties

¥ 4,382

$ 629

Hunan Qindao Network Media Technology Co., Ltd. [Member]

Amount due from related parties

^[1]

¥ 4,382

[1]	The amount of RMB33,460 as of December 31, 2017 represented the advance payment of revenue sharing of live video service made to Hunan Qindao Network Media Technology Co., Ltd.

- Definition

The aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due within one year (or one business cycle).

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-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(k)(1))
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-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

+ Details

Related Party Balances and Transactions - Schedule of Amount Due from Related Parties-current (Parenthetical) (Detail) - Dec. 31, 2019
¥ in Thousands, $ in Thousands

CNY (¥)

USD ($)

Uncollected amounts for the mobile marketing services

¥ 4,382

$ 629

Hunan Qindao Network Media Technology Co., Ltd. [Member]

Uncollected amounts for the mobile marketing services

^[1]

¥ 4,382

[1]	The amount of RMB33,460 as of December 31, 2017 represented the advance payment of revenue sharing of live video service made to Hunan Qindao Network Media Technology Co., Ltd.

- Definition

+ References

+ Details

Related Party Balances and Transactions - Schedule of Amount Due to Related Parties-current (Detail)
¥ in Thousands, $ in Thousands

Dec. 31, 2019

CNY (¥)

Dec. 31, 2019

USD ($)

Dec. 31, 2018

CNY (¥)

¥ 29,606

$ 4,253

¥ 82,948

Hunan Qindao Network Media Technology Co., Ltd. [Member]

^[1]

29,596

43,178

Ordinary Shareholders [Member]

^[2]

39,704

Others [Member]

¥ 10

¥ 66

[1]	The amount of RMB43,178 as of December 31, 2018 primarily represented the unpaid revenue sharing of live video service to Hunan Qindao Network Media Technology Co., Ltd.
[2]	The amount of RMB39,704 and RMB0 as of December 31, 2018 and 2019 primarily included the unpaid repurchase amount by the Group to its ordinary shareholders.

- Definition

Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer).

+ References + Details

Related Party Balances and Transactions - Schedule of Amount Due to Related Parties-current (Parenthetical) (Detail)
¥ in Thousands, $ in Thousands

Dec. 31, 2019

CNY (¥)

Dec. 31, 2019

USD ($)

Dec. 31, 2018

CNY (¥)

¥ 29,606

$ 4,253

¥ 82,948

Hunan Qindao Network Media Technology Co., Ltd. [Member]

^[1]

29,596

43,178

Ordinary Shareholders [Member]

^[2]

39,704

Unpaid Repurchase [Member] | Ordinary Shareholders [Member]

39,704

Unpaid Revenue [Member] | Hunan Qindao Network Media Technology Co., Ltd. [Member]

¥ 29,596

¥ 43,178

[1]	The amount of RMB43,178 as of December 31, 2018 primarily represented the unpaid revenue sharing of live video service to Hunan Qindao Network Media Technology Co., Ltd.
[2]	The amount of RMB39,704 and RMB0 as of December 31, 2018 and 2019 primarily included the unpaid repurchase amount by the Group to its ordinary shareholders.

- Definition

+ References + Details

Related Party Balances and Transactions - Schedule of Sales to Related Parties (Detail) - CNY (¥)
¥ in Thousands

12 Months Ended

Dec. 31, 2019

Dec. 31, 2018

Dec. 31, 2017

¥ 5,449

¥ 0

¥ 21,722

Hunan Qindao Network Media Technology Co Ltd [Member]

5,449

Hangzhou Yihong Advertisement Co., Ltd. [Member]

^[1]

17,659

Hangzhou Alimama Technology Co., Ltd. [Member]

^[1]

2,309

Guangzhou Aijiuyou Informational Technology Co., Ltd. [Member]

^[2]

1,242

Zhejiang Tmall Technology Co., Ltd. [Member]

^[1]

500

Shanghai Xisue Network Technology Co., Ltd. [Member]

^[1]

Others [Member]

¥ 0

¥ 12

[1]	The sales to related parties represented mobile marketing services provided.
[2]	The sales to related parties represented mobile game revenue generated through those game operating companies.

- Definition

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

+ References + Details

Related Party Balances and Transactions - Schedule of Purchase from Related Parties (Detail) - CNY (¥)
¥ in Thousands

12 Months Ended

Dec. 31, 2019

Dec. 31, 2018

Dec. 31, 2017

¥ 499,859

¥ 431,350

¥ 278,873

Hunan Qindao Network Media Technology Co., Ltd. [Member]

^[1]

497,789

429,345

139,406

Beijing Shiyue Haofeng Media Co Ltd [Member]

^[1]

2,070

¥ 2,005

Alibaba Cloud Computing Co Ltd [Member]

^[2]

74,705

Hunan Qindao Cultural Spread Ltd. [Member]

^[1]

61,676

Taobao (China) Software Co., Ltd. [Member]

2,283

Guangzhou Jianyue Information Technology Co., Ltd. [Member]