CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) [Abstract]
Net loss	$ (3,552)	$ (7,387)	$ (11,244)	$ (21,335)
Other comprehensive gain (loss), net of tax:
Change in equity adjustment from foreign currency translation, net of tax	0	0	0	4
Change in unrealized gain (loss) on investments, net of tax	3	(1)	(2)	12
Total other comprehensive income gain (loss)	3	(1)	(2)	16
Comprehensive loss	$ (3,549)	$ (7,388)	$ (11,246)	$ (21,319)