CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - 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 (Unaudited) [Abstract]
Net loss	$ (7,387)	$ (6,097)	$ (21,335)	$ (21,498)
Other comprehensive gain (loss), net of tax:
Change in equity adjustment from foreign currency translation, net of tax	0	2	4	(1)
Change in unrealized gain (loss) on investments, net of tax	(1)	(1)	12	6
Total other comprehensive income gain (loss)	(1)	1	16	5
Comprehensive loss	$ (7,388)	$ (6,096)	$ (21,319)	$ (21,493)