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Concentration and Risks - Additional Information (Detail) - Foreign Currency exchange rate risk [Member] - RMB Against US Dollar [Member]
 1 Months Ended 12 Months Ended
Jul. 31, 2005
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Concentration Risk [Line Items]        
Percentage of depreciation in foreign currency exchange rate       1.70%
Percentage of appreciation in foreign currency exchange rate   2.30% 6.50%  
Minimum [Member]        
Concentration Risk [Line Items]        
Minimum percent of appreciation of domestic currency against foreign currency over following three years 20.00%