Accounts Receivable and Contract Assets, Net - Schedule of Changes in Allowance for Credit Losses for Accounts Receivable (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Allowance for Credit Loss [Abstract]
Balance, beginning of period	$ (2,257)	$ (1,051)	$ (1,125)	$ (711)
Provision for expected credit losses	(372)	(253)	(1,700)	(642)
Write-offs	32	148	228	197
Balance, end of period	$ (2,597)	$ (1,156)	$ (2,597)	$ (1,156)