Accounts Receivable and Contract Assets, Net - Schedule of Changes in Sales Reserve (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accounts Receivable Net [Abstract]
Balance, beginning of period	$ (175)	$ (175)
Additions		(200)
Write-offs	26
Balance, end of period	$ (149)	$ (375)