CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS [Abstract]
Net income (loss)	$ (27,608)	$ (26,924)	$ (17,263)
Other comprehensive income (loss), net of tax:
Change in equity adjustment from foreign currency translation, net of tax	(12)	0	0
Change in unrealized gain (loss) on investments, net of tax	(33)	12	(3)
Total other comprehensive income(loss), net of tax	(45)	12	(3)
Comprehensive loss	$ (27,653)	$ (26,912)	$ (17,266)