Income Taxes - Schedule of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
State	$ 745	$ 270	$ 350
Federal	0	513	0
Foreign	0	2,336	2,772
Current income tax expense (benefit)	745	3,119	3,122
Deferred:
Foreign	0	(755)	69
Deferred income tax expense (benefit)	0	(755)	69
Income tax expense	$ 745	$ 2,364	$ 3,191