Quarterly report pursuant to Section 13 or 15(d)

Stock options and warrants (Schedule of fair value assumptions) (Details)

v3.5.0.2
Stock options and warrants (Schedule of fair value assumptions) (Details)
9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Dividend yield 0.00% 0.00%
Expected price volatility   93.00%
Expected price volatility, minimum 99.00%  
Expected price volatility, maximum 100.00%  
Risk free interest rate 1.20% 1.39%
Expected term 5 years 5 years