Accounts Receivable, Net - Schedule of Changes in Sales Reserve (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Accounts Receivable Net [Abstract]
Balance, beginning of period	$ (100)	$ (45)
Additions		(80)
Write-offs	22
Balance, end of period	$ (78)	$ (125)