Related Parties - Summary of Sales to and Purchases from ATR's Minority Shareholder and Its Affiliates (Detail) ¥ in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2025 USD ($)	Mar. 31, 2025 CNY (¥)	Mar. 31, 2024 USD ($)	Mar. 31, 2024 CNY (¥)
Related Party Transaction [Line Items]
Sales to related parties	$ 104,265		$ 110,215
ATR [Member]
Related Party Transaction [Line Items]
Purchases from related parties	2,076	¥ 15,089	1,237	¥ 8,848
ATR [Member] | Related Party [Member]
Related Party Transaction [Line Items]
Sales to related parties	$ 5,039	¥ 36,621	$ 190	¥ 1,356