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Fair Value Measurements - Summary of Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis (Detail) - Dec. 31, 2020 - Fair Value, Recurring [Member] ¥ in Thousands, $ in Thousands	CNY (¥)	USD ($)
Fair Value, Net Asset (Liability) [Abstract]
Short-term investments	¥ 73,022	$ 11,191
Total	73,022	$ 11,191
Level 2
Fair Value, Net Asset (Liability) [Abstract]
Short-term investments	73,022
Total	¥ 73,022

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- Definition

Fair value of asset after deduction of liability.

+ References

No definition available.

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- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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