Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Loss [Abstract]
Net (loss) income	$ (3,404)	$ 4,097	$ (7,201)	$ (3,314)
Other comprehensive loss:
Unrealized loss on available-for-sale securities				(906)
Tax effect				329
Other comprehensive loss, net of tax				(577)
Comprehensive (loss) income	$ (3,404)	$ 4,097	$ (7,201)	$ (3,891)