CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS [Abstract]
Net loss	[1]	$ (15,956)	$ (27,041)	$ (3,483)
Other comprehensive loss:
Change in foreign currency translation adjustment		(77)	(236)	(117)
Change in net unrealized gain (loss) on investments		50	(38)	(37)
Other comprehensive loss	[1]	(27)	(274)	(154)
Comprehensive loss		$ (15,983)	$ (27,315)	$ (3,637)

[1] Prior periods adjusted to reflect the impact of the one-for-three reverse stock split that became effective on January 20, 2017, as discussed in Note 1.