Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net loss	$ (1,022)	$ (2,051)
Available-for-sale investments
Net change in unrealized gain (loss) on available-for-sale investments	3	69
Less: Reclassification adjustment for gains on investments recognized during the year	(4)
Net change in unrealized gain (loss) on available-for-sale investments	(1)	69
Tax provision (benefit)
Other comprehensive income (loss), net of tax	(1)	69
Comprehensive loss	$ (1,023)	$ (1,982)