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Accounts Receivable - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Disclosure of accounts receivable [line items]    
Non - current account receivable $ 1,054 $ 2,139
Bottom of range [member]    
Disclosure of accounts receivable [line items]    
Trade receivable term 30 days  
Top of range [member]    
Disclosure of accounts receivable [line items]    
Trade receivable term 90 days