Accounts Receivable, Net - Schedule of Changes in Sales Reserve (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accounts Receivable Net [Abstract]
Balance, beginning of period	$ (195)	$ (209)	$ (200)	$ (100)
Additions				(133)
Write-offs	4	69	9	93
Balance, end of period	$ (191)	$ (140)	$ (191)	$ (140)