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Summary of Significant Accounting Policies - Schedule of Estimated Useful Life and Residual Value of Property and Equipment Net (Detail)	12 Months Ended
	Dec. 31, 2019
Office Furniture and Equipment [Member]
Property Plant And Equipment [Line Items]
Residual value	5.00%
Computer and Electronic Equipment [Member]
Property Plant And Equipment [Line Items]
Residual value	5.00%
Leasehold Improvements [Member]
Property Plant And Equipment [Line Items]
Estimated useful life	shorter of remaining lease period or estimated useful life
Residual value
Software [Member]
Property Plant And Equipment [Line Items]
Residual value
Minimum [Member] | Office Furniture and Equipment [Member]
Property Plant And Equipment [Line Items]
Estimated useful life	3 years
Minimum [Member] | Computer and Electronic Equipment [Member]
Property Plant And Equipment [Line Items]
Estimated useful life	3 years
Minimum [Member] | Software [Member]
Property Plant And Equipment [Line Items]
Estimated useful life	1 year
Maximum [Member] | Office Furniture and Equipment [Member]
Property Plant And Equipment [Line Items]
Estimated useful life	5 years
Maximum [Member] | Computer and Electronic Equipment [Member]
Property Plant And Equipment [Line Items]
Estimated useful life	5 years
Maximum [Member] | Software [Member]
Property Plant And Equipment [Line Items]
Estimated useful life	5 years

X

- 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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 35
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=68071081&loc=d3e1205-110223

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790

+ Details

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Definition

Stated as a percentage, the estimated or actual value of the asset at the end of its useful life or when it is no longer serviceable (cannot be used for its original purpose) divided by its [historical] capitalized cost.

+ References

No definition available.

+ Details

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