Accounts Receivable, Net - Schedule of Changes in Sales Reserve (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Accounts Receivable Net [Abstract]
Balance, beginning of period	$ (100)	$ (45)
Additions	(193)	(79)
Write-offs	93	24
Balance, end of period	$ (200)	$ (100)