Stockholders' Equity and Employee Stock Option Plans (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Stockholders' Equity and Employee Stock Option Plans (Textual) [Abstract]
Total intrinsic value of options exercised	$ 0	$ 0		$ 3,000
Total fair value of RSUs vested and released	$ 58,000	$ 351,000	$ 374,000	$ 1,100,000