Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation (Details)

v3.6.0.2
Stock-Based Compensation (Details) - $ / shares
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
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 $ 0.80 $ 1.54 $ 1.46
Expected volatility 96.00% 88.00% 101.00%
Risk free interest rate 1.40% 1.32% 1.57%
Expected life of option   5 years 5 years
Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Exercise price $ 2.66 $ 2.76 $ 2.91
Expected volatility 123.00% 131.00% 150.00%
Risk free interest rate 2.13% 2.19% 2.73%
Expected life of option   10 years 10 years