Stock-Based Compensation (Details 1) (Stock Option [Member], USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, Beginning Balance	3,909,580	4,453,746
Options, Granted	587,500	222,500
Options, Exercised	(6,583)	(291,666)
Options, Forfeited	0	(475,000)
Options, Ending Balance	4,490,497	3,909,580	4,453,746
Options, Exercisable	3,202,164
Weighted Average Exercise Price, Beginning Balance	$ 1.78	$ 1.78
Weighted Average Exercise Price, Granted	$ 2.73	$ 1.69
Weighted Average Exercise Price, Exercised	$ 0.58	$ 0.79
Weighted Average Exercise Price, Forfeited	$ 0	$ 2.30
Weighted Average Exercise Price, Ending Balance	$ 1.91	$ 1.78	$ 1.78
Weighted Average Exercise Price, Exercisable	$ 1.72
Weighted Average Remaining Contractual Life, Balance Outstanding	5 years 6 months 18 days	5 years 7 months 2 days	6 years 5 months 5 days
Weighted Average Remaining Contractual Life, Exercisable	5 years 29 days
Aggregate Intrinsic Value, Beginning Balance	$ 785,000	$ 1,308,000
Aggregate Intrinsic Value, Ending Balance	3,183,000	785,000	1,308,000
Aggregate Intrinsic Value, Exercisable	2,946,000
Grant date fair value of options granted	$ 1,358,000	$ 350,000
Weighted average grant date fair value	$ 2.31	$ 1.57