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, 2026 USD ($)	Mar. 31, 2026 CNY (¥)	Mar. 31, 2025 USD ($)	Mar. 31, 2025 CNY (¥)
Related Party Transaction [Line Items]
Sales to related parties	$ 108,327		$ 104,265
ATR [Member]
Related Party Transaction [Line Items]
Purchases from related parties	2,487	¥ 17,232	2,076	¥ 15,089
Related Party [Member] \| ATR [Member]
Related Party Transaction [Line Items]
Sales to related parties	$ 5,196	¥ 36,001	$ 5,039	¥ 36,621

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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