Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation and Warrants (Details 1)

v3.8.0.1
Stock-Based Compensation and Warrants (Details 1) - Stock Option [Member] - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options, Granted 3,159,177 3,861,425 3,781,666  
Options, Exercised (418,773) (445,334) (35,008)  
Options, Expired (667,628) (338,529) (483,332)  
Options, Forfeited (1,144,905) (383,265) (302,502)  
Options, Ending Balance 12,564,098 11,636,227 8,941,930 5,981,106
Options, Exercisable 7,805,796      
Weighted Average Exercise Price, Granted $ 0.59 $ 0.98 $ 2.37  
Weighted Average Exercise Price, Exercised 0.40 1.83 1.16  
Weighted Average Exercise Price, Expired 2.21 1.96 2.48  
Weighted Average Exercise Price, Forfeited 1.20 2.26 1.91  
Weighted Average Exercise Price, Ending Balance 1.55 $ 1.77 $ 2.14 $ 2.01
Weighted Average Exercise Price, Exercisable $ 1.96      
Weighted Average Remaining Contractual Life, Balance Outstanding 4 years 7 months 6 days 5 years 5 months 26 days 5 years 8 months 1 day 5 years 9 months 18 days
Weighted Average Remaining Contractual Life, Exercisable 3 years 5 months 5 days      
Aggregate Intrinsic Value, Exercised $ 163,050 $ 137,488 $ 44,000  
Aggregate Intrinsic Value, Ending Balance 1,800 194,355 $ 2,900,000 $ 685,000
Aggregate Intrinsic Value, Exercisable 1,800      
Grant date fair value of options granted $ 1,164,732 $ 3,091,000    
Weighted average grant date fair value $ 0.37 $ 0.8