Accounts Receivable and Contract Assets, Net - Schedule of Changes in Allowance for Credit Losses for Accounts Receivable (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Allowance For Credit Loss [Abstract]
Balance, beginning of period	$ (3,788)	$ (1,125)
Provision for expected credit losses	(1,012)	(743)
Write-offs	28	115
Balance, end of period	$ (4,772)	$ (1,753)