Accounts Receivable and Contract Assets, Net - Schedule of Changes in Sales Reserve (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Accounts Receivable Net [Abstract]
Balance, beginning of period	$ (375)	$ (200)	$ (175)	$ (200)
Additions	0	0	(200)	0
Write-offs	0	5	0	5
Balance, end of period	$ (375)	$ (195)	$ (375)	$ (195)