Accounts Receivable and Contract Assets, Net - Schedule of Changes in Sales Reserve (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Accounts Receivable Net [Abstract]
Balance, beginning of period	$ (149)	$ (375)	$ (175)	$ (175)
Additions	(259)		(259)	(200)
Write-offs	8	0	34
Balance, end of period	$ (400)	$ (375)	$ (400)	$ (375)