CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Consolidated Statements of Comprehensive (Loss) Income
Net loss	$ (14,879)	$ (17,064)	$ (30,183)	$ (29,767)
Other comprehensive income, net of tax
Net change in unrealized gains on available-for-sale securities	8		67
Other comprehensive income, net of tax	8		67
Comprehensive loss	$ (14,871)	$ (17,064)	$ (30,116)	$ (29,767)