Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation and Warrants (Details)

v3.8.0.1
Stock-Based Compensation and Warrants (Details) - $ / shares
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected dividends 0.00% 0.00% 0.00%
Expected life of option   7 years  
Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Exercise price $ 0.52 $ 0.80 $ 1.54
Expected volatility 83.00% 96.00% 88.00%
Risk free interest rate 1.67% 1.40% 1.32%
Expected life of option 4 years   5 years
Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Exercise price $ 0.87 $ 2.66 $ 2.76
Expected volatility 96.00% 123.00% 131.00%
Risk free interest rate 2.28% 2.13% 2.19%
Expected life of option 7 years   10 years