Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details 2)

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Stockholders' Equity (Details 2) - USD ($)
6 Months Ended
Jun. 30, 2015
Dec. 31, 2014
Stockholders Equity [Line Items]    
Number of Options Outstanding 19,261,632  
Weighted-Average Exercise Price $ 1.94 $ 1.89
Weighted-Average Remaining Contractual Life (in Years) 4 years 9 months 18 days  
Aggregate Intrinsic Value $ 11,043,872 $ 20,306,807
Range One [Member]    
Stockholders Equity [Line Items]    
Range of Exercise Price (Lower) $ 0.50  
Range of Exercise Price (Upper) $ 1.00  
Number of Options Outstanding 7,000,000  
Weighted-Average Exercise Price $ 0.80  
Weighted-Average Remaining Contractual Life (in Years) 5 years 1 month 6 days  
Aggregate Intrinsic Value $ 7,980,000  
Range Two [Member]    
Stockholders Equity [Line Items]    
Range of Exercise Price (Lower) $ 1.01  
Range of Exercise Price (Upper) $ 2.00  
Number of Options Outstanding 4,101,336  
Weighted-Average Exercise Price $ 1.19  
Weighted-Average Remaining Contractual Life (in Years) 6 years 4 months 24 days  
Aggregate Intrinsic Value $ 3,063,872  
Range Three [Member]    
Stockholders Equity [Line Items]    
Range of Exercise Price (Lower) $ 2.01  
Range of Exercise Price (Upper) $ 3.00  
Number of Options Outstanding 2,122,669  
Weighted-Average Exercise Price $ 2.50  
Weighted-Average Remaining Contractual Life (in Years) 4 years 3 months 18 days  
Range Four [Member]    
Stockholders Equity [Line Items]    
Range of Exercise Price (Lower) $ 3.01  
Range of Exercise Price (Upper) $ 5.00  
Number of Options Outstanding 6,037,627  
Weighted-Average Exercise Price $ 3.57  
Weighted-Average Remaining Contractual Life (in Years) 3 years 8 months 12 days