Revenues - Additional Information (Detail) $ in Thousands	6 Months Ended
Jun. 30, 2023 CNY (¥)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 CNY (¥)
Disclosure Of Detailed Information About Revenue [Line Items]
Revenue	¥ 84,776,000	$ 11,690	¥ 36,489,000
At Point in Time [member]
Disclosure Of Detailed Information About Revenue [Line Items]
Revenue	69,400,000		36,500,000
At Over in Time [member]
Disclosure Of Detailed Information About Revenue [Line Items]
Revenue	¥ 15,400,000		¥ 0

The income arising in the course of an entity's ordinary activities. Income is increases in assets, or decreases in liabilities, that result in increases in equity, other than those relating to contributions from holders of equity claims.

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+ Details