Quarterly report pursuant to Section 13 or 15(d)

5. Stock-based compensation (Details)

v3.5.0.2
5. Stock-based compensation (Details)
9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Dividend yield (%) [1] 0.00% 0.00%
Expected volatility (%) 92.40% 125.40%
Average Risk-free interest rate (%) 1.56% 1.70%
Expected life of stock option term (years) 8 years 7 years 7 months 6 days
[1] The dividend yield is zero as the Company has never paid and does not expect to pay dividends on its common stock.