Consolidated Statements of Comprehensive Loss (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net loss	$ (4,649)	$ (932)	$ (6,748)	$ (2,352)
Other comprehensive (loss) gain:
Unrealized (loss) gain on investments	(15)	(5)	(19)	11
Other comprehensive (loss) gain	(15)	(5)	(19)	11
Comprehensive loss	$ (4,664)	$ (937)	$ (6,767)	$ (2,341)