CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS
Net loss	$ (13,386)	$ (11,401)	$ (14,442)	$ (24,109)
Other comprehensive loss:
Unrealized gain on securities, net of taxes	109	190	234	627
Comprehensive loss	$ (13,277)	$ (11,211)	$ (14,208)	$ (23,482)