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 loss	$ (4,747)	$ (6,548)	$ (10,061)
Available-for-sale investments
Net change in unrealized (loss) gain on available-for-sale investments	(21)	959	723
Less: Reclassification adjustment for net gains on investments recognized during the year	(9)	(19)	(5)
Net change in unrealized (loss) gain on available-for-sale investments	(30)	940	718
Tax provision (benefit)	0	18	(197)
Other comprehensive income (loss), net of tax	(30)	922	915
Comprehensive loss	$ (4,777)	$ (5,626)	$ (9,146)