Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details 3)

v3.8.0.1
Stockholders' Equity (Details 3)
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Expected years until exercise 3 years 6 months 3 years 6 months    
Dividend yield 0.00% 0.00% 0.00% 0.00%
Minimum [Member]        
Expected stock volatility 70.70% 72.90% 70.70% 72.00%
Risk free interest rate 1.50% 0.92% 1.38% 0.92%
Expected years until exercise     2 years 6 months 2 years 6 months
Maximum [Member]        
Expected stock volatility 71.40% 73.90% 72.70% 80.00%
Risk free interest rate 1.65% 1.02% 1.79% 1.77%
Expected years until exercise     3 years 6 months 3 years 6 months