Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (18,053)	$ 422	$ (18,673)
Other comprehensive loss:
Unrealized gain (loss) on investments, net of tax of $0, $0, and $0 for the years ended December 31 2016, 2015 and 2014, respectively.	67	(68)	0
Foreign currency translation adjustments	(325)	61	(104)
Other comprehensive loss	(258)	(7)	(104)
Comprehensive income (loss)	$ (18,311)	$ 415	$ (18,777)