Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
BASIC AND DILUTED
Weighted average number of common shares outstanding	40,499	39,233	40,477	38,587
Net loss	$ (1,792)	$ (3,874)	$ (3,864)	$ (7,882)
Net loss per shares basic and diluted	$ (0.04)	$ (0.10)	$ (0.10)	$ (0.20)