Accounts Receivable, Net - Schedule of Changes in Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Accounts Receivable Net [Abstract]
Balance, beginning of period	$ (810)	$ (637)	$ (711)	$ (863)
(Additions)/reductions	(241)	(83)	(389)	109
Write-offs		4	49	38
Balance, end of period	$ (1,051)	$ (716)	$ (1,051)	$ (716)