CONDENSED 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
Net loss	$ (1,534)	$ (4,618)	$ (9,179)	$ (16,976)
Other comprehensive income (loss):
Net foreign currency translation gain	17		21
Change in net unrealized gain (loss) on marketable securities	(56)	32	(68)	85
Tax provision on other comprehensive income (loss)	0	0	0	0
Other comprehensive income (loss), net of tax	(39)	32	(47)	85
Comprehensive loss	$ (1,573)	$ (4,586)	$ (9,226)	$ (16,891)