Accounts Receivable, Net - Schedule of Changes in Sales Reserve (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts Receivable Net [Abstract]
Balance, beginning of period	$ (175)	$ (200)	$ (100)
(Additions) reductions	(85)	16	(193)
Write-offs	85	9	93
Balance, end of period	$ (175)	$ (175)	$ (200)