v3.26.1
Related Parties - Additional Information (Detail) - ATR [Member]
¥ 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]        
Land lease commenced year 2007 2007    
Land lease expiry year 2054 2054    
Rent paid $ 31 ¥ 223 $ 31 ¥ 223
Akers AB [Member]        
Related Party Transaction [Line Items]        
Ownership interest percentage 59.88% 59.88%