Income Taxes - Components of Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Federal	$ 0	$ 0	$ (274)
State	90	104	41
Foreign	493	469	315
Current income tax	583	573	82
Foreign	(48)	8	(96)
Deferred income tax	(48)	8	(96)
Provision for (benefit from) income taxes	$ 535	$ 581	$ (14)