Share-Based Compensation - Expenses Recorded by Group (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
Dec. 31, 2025 CNY (¥)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 CNY (¥)	Dec. 31, 2023 CNY (¥)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expenses	¥ 2,838	$ 19,840	¥ 26,101	¥ 33,554
Cost of Sales [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expenses	2	16	81	370
Research and Development Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expenses	1,193	171	1,924	580
Selling and Marketing Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expenses	773	111	(662)	509
General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expenses	¥ 17,858	$ 2,554	¥ 24,758	¥ 32,095

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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+ Details