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Deferred Grants - Additional Information (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020 CNY (¥)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2020 USD ($)
Statement 1 [Line Items]
Revenue From Government Grants	¥ 209,793	$ 32,419	¥ 122,371	¥ 32,237
Deferred grant outstanding	518,142		656,776		$ 80,068
Grant Related to Assets [Member]
Statement 1 [Line Items]
Deferred grant outstanding	271,600		¥ 434,800		$ 42,000
JSS Grant [Member]
Statement 1 [Line Items]
Revenue From Government Grants	¥ 1,100	$ 200

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- References

No definition available.

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- Definition

The amount of non-current government grants recognised on the statement of financial position as deferred income. [Refer: Government [member]; Deferred income; Government grants]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

The amount of income recognised in relation to government grants. [Refer: Government grants]

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