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Stockholders' Equity (Details 3) (USD $)
3 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of options outstanding 1,294,733 1,264,345
Options outstanding, Weighted average remaining contractual life (Years) 7 years 5 months 23 days  
Options outstanding, Weighted average exercise price $ 3.36 $ 3.25
Options outstanding, Aggregate Intrinsic Value $ 5,282,361  
Number of options exerciseable 1,000,604  
Options exercisable, Weighted average remaining contractual life (Years) 6 years 11 months 12 days  
Options exercisable, Weighted average exercise price $ 2.83  
Options exercisable, Aggregate Intrinsic Value $ 4,612,966