Accounts Receivable, Net - Schedule of Changes in Sales Reserve (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Accounts Receivable Net [Abstract]
Balance, beginning of period	$ (45)	$ (45)
Additions	(79)	0
Write-offs	24	0
Balance, end of period	$ (100)	$ (45)