Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation (Details 1)

v3.8.0.1
Stock-based Compensation (Details 1)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Dividend yield 0.00% 0.00%
Risk-free interest rate 2.74%  
Risk-free interest rate, minimum   2.05%
Risk-free interest rate, maximum   2.40%
Expected term (in years) 10 years  
Volatility 88.00%  
Volatility, minimum   80.00%
Volatility, maximum   82.00%
Minimum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected term (in years)   6 years
Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected term (in years)   10 years