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Income Tax Expense - Additional Information (Detail)
¥ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2024
CNY (¥)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2022
Dec. 31, 2024
USD ($)
Disclosure of income tax expense [line items]        
Applicable income tax rate 15.00% 15.00% 15.00%  
Percentage of withholding tax 10.00%      
Deferred tax liability for withholding tax payable ¥ 64.7 ¥ 64.7   $ 9.0
Unrecognized deferred tax liability relating to undistributed earnings ¥ 227.2 ¥ 204.7   $ 31.7
PRC [member] | Bottom of range [member]        
Disclosure of income tax expense [line items]        
Unrecognized tax losses expiration period for subsidiaries that have a history of losses 5 years      
PRC [member] | Top of range [member]        
Disclosure of income tax expense [line items]        
Unrecognized tax losses expiration period for subsidiaries that have a history of losses 10 years      
Malaysia [member]        
Disclosure of income tax expense [line items]        
Unrecognized tax losses expiration period for subsidiaries that have a history of losses 10 years