Related Parties - Summary of Balances Outstanding with ATR's Minority Shareholder and Its Affiliates (Detail) ¥ in Thousands, $ in Thousands	Mar. 31, 2025 USD ($)	Mar. 31, 2025 CNY (¥)	Dec. 31, 2024 USD ($)	Dec. 31, 2024 CNY (¥)
Related Party Transaction [Line Items]
Accounts receivable from related parties	$ 82,537		$ 70,611
Accounts payable to related parties	41,342		36,310
ATR [Member] \| Related Party [Member]
Related Party Transaction [Line Items]
Accounts receivable from related parties	2,380	¥ 17,272	1,839	¥ 13,422
Accounts payable to related parties	$ 623	¥ 4,519	$ 411	¥ 3,001

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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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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