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Short-Term Bank Loans - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2017
Short-term Debt [Line Items]        
Proceeds from bank loan   $ 50,000    
Repayments of bank debt   50,000    
Interest expense $ 0 $ 11 $ 0  
Interest rate       0.78%