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Leases - Summary of Information Related To Operating Leases (Detail) ¥ in Thousands, $ in Thousands	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Jan. 01, 2020 CNY (¥)
Disclosure Of Supplemental Information Related To Operating Leases [Line Items]
Operating lease ROU assets	¥ 28,941	$ 4,541	¥ 4,282
Operating lease liabilities-non-current	(17,076)	(2,680)	(587)	¥ (3,400)
Operating lease liabilities-current	(13,929)	$ (2,186)	(3,709)	(8,300)
Total operating lease liabilities	¥ (31,005)		¥ (4,296)	¥ (11,700)
Weighted average remaining lease term	2 years 6 months	2 years 6 months	1 year 3 months 18 days
Weighted average discount rate	7.00%	7.00%	7.00%

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- Definition

Disclosure of supplemental information related to operating leases.

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Present value of lessee's discounted obligation for lease payments from operating lease.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 45
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Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

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Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

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Amount of lessee's right to use underlying asset under operating lease.

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Weighted average discount rate for operating lease calculated at point in time.

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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.

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