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Accounts Receivable and Contract Assets, Net - Schedule of Changes in Allowance for Credit Losses for Contract Assets (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Allowance For Credit Loss [Abstract]    
Balance, beginning of period $ (398)  
Provision for expected credit losses (444) $ (25)
Balance, end of period $ (842) $ (25)