Related Parties - Summary of Sales to and Purchases from ATR's Minority Shareholder and Its Affiliates (Detail) ¥ in Thousands, $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2023 CNY (¥)	Sep. 30, 2022 USD ($)	Sep. 30, 2022 CNY (¥)	Sep. 30, 2023 USD ($)	Sep. 30, 2023 CNY (¥)	Sep. 30, 2022 USD ($)	Sep. 30, 2022 CNY (¥)
Related Party Transaction [Line Items]
Revenues	$ 102,218		$ 99,647		$ 314,232		$ 296,655
ATR [Member]
Related Party Transaction [Line Items]
Purchases from related parties	1,913	¥ 13,752	1,020	¥ 7,539	5,236	¥ 36,885	6,838	¥ 45,251
ATR [Member] | Related Party [Member]
Related Party Transaction [Line Items]
Revenues	$ 18	¥ 346	$ 2,419	¥ 16,620	$ 2,741	¥ 19,306	$ 6,959	¥ 46,049