Income Taxes - Schedule of Provision for (Benefit from) Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal		$ (23)
State	$ 48	51	$ 31
Foreign	753	31	109
Current income tax expense (benefit), Total	801	59	140
Deferred:
Federal	(11,425)	3,307	(1,823)
State	(3,250)	(669)	(396)
Foreign	(1,135)	(359)	(296)
Deferred income tax expense (benefit), Total	(15,810)	2,279	(2,515)
Change in valuation allowance	15,805	(2,291)	2,351
Total	$ 796	$ 47	$ (24)