Income Taxes - Components of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal	$ (30)	$ 0	$ 0
State	(14)	(20)	(24)
Foreign	(1,319)	(254)	(113)
Total current provision	(1,363)	(274)	(137)
Deferred:
State	0	2,042	0
Foreign	2,838	3,107	0
Total deferred benefit	2,838	5,149	0
Total benefit (provision) for income taxes	$ 1,475	$ 4,875	$ (137)