CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS
Net loss	$ (9,152)	$ (16,106)	$ (33,261)	$ (80,924)
Other comprehensive loss:
Unrealized (loss) gain on securities, net of taxes	(158)	51	469	124
Comprehensive loss	$ (9,310)	$ (16,055)	$ (32,792)	$ (80,800)