Condensed Consolidated Statements of Comprehensive Loss (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net loss	$ (2,741)	$ (638)	$ (6,351)	$ (2,801)
Available-for-sale investments
Net change in unrealized gain (loss) on available-for-sale investments	26	(125)	28	(121)
Less: Reclassification adjustment for gains on investments recognized during the year	(1)	0	(1)
Net change in unrealized gain (loss) on available-for-sale investments	25	(125)	27	(121)
Tax provision (benefit)	9	(2)	10
Other comprehensive income (loss), net of tax	16	(123)	17	(121)
Comprehensive loss	$ (2,725)	$ (761)	$ (6,334)	$ (2,922)