Stock-Based Compensation (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value	$ 1.69
Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, Beginning Balance	4,453,746	2,979,010
Options, Granted	222,500	2,075,000
Options, Exercised	(291,666)	(374,851)
Options, Forfeited	(475,000)	(225,413)
Options, Ending Balance	3,909,580	4,453,746	2,979,010
Options, Exercisable	3,153,537
Weighted Average Exercise Price, Beginning Balance	$ 1.78	$ 1.34
Weighted Average Exercise Price, Granted	$ 1.69	$ 2.21
Weighted Average Exercise Price, Exercised	$ 0.79	$ 0.34
Weighted Average Exercise Price, Forfeited	$ 2.30	$ 2.37
Weighted Average Exercise Price, Ending Balance	$ 1.78	$ 1.78	$ 1.34
Weighted Average Exercise Price, Exercisable	$ 1.69
Weighted Average Remaining Contractual Life, Balance Outstanding	5 years 7 months 2 days	6 years 5 months 5 days	6 years 4 days
Weighted Average Remaining Contractual Life, Exercisable	5 years 2 months 26 days
Aggregate Intrinsic Value, Beginning Balance	$ 1,308,000	$ 0
Aggregate Intrinsic Value, Exercised	71,000	661,000
Aggregate Intrinsic Value, Ending Balance	785,000	1,308,000	0
Aggregate Intrinsic Value, Exercisable	773,000
Grant date fair value of options granted	$ 350,000	$ 4,468,000
Weighted average grant date fair value	$ 1.57	$ 2.15