Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income
Net loss	$ (21,013)	$ (21,761)	$ (8,819)
Change in unrealized gain/loss on available-for-sale-securities	13	(37)
Other comprehensive income/(loss)	13	(37)
Comprehensive loss, net of income tax	$ (21,000)	$ (21,798)	$ (8,819)