Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net loss	$ (1,229)	$ (1,889)	$ (3,280)	$ (5,533)
Available-for-sale investments
Net change in unrealized gain (loss) on available-for-sale investments	11	(13)	80	20
Less: Reclassification adjustment for gains on investments recognized during the year		(1)		(2)
Net change in unrealized gain (loss) on available-for-sale investments	11	(14)	80	18
Tax provision (benefit)	29	(5)	29	6
Other comprehensive income (loss), net of tax	(18)	(9)	51	12
Comprehensive loss	$ (1,247)	$ (1,898)	$ (3,229)	$ (5,521)