CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS [Abstract]
Net loss	$ (29,234)	$ (9,902)	$ (27,608)
Other comprehensive income (loss), net of tax:
Change in equity adjustment from foreign currency translation, net of tax	(1)	0	(12)
Change in unrealized gain (loss) on investments, net of tax	(3)	22	(33)
Total other comprehensive income (loss), net of tax	(4)	22	(45)
Comprehensive loss	$ (29,238)	$ (9,880)	$ (27,653)