Annual report pursuant to Section 13 and 15(d)

Equity - Schedule of Assumptions (Details)

v3.8.0.1
Equity - Schedule of Assumptions (Details)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Class of Warrant or Right [Line Items]    
Risk-free interest rate (as a percent)   1.30%
Volatility (as a percent) 80.00%  
Expected dividend yield (as a percent) 0.00% 0.00%
Minimum    
Class of Warrant or Right [Line Items]    
Risk-free interest rate (as a percent) 1.83%  
Volatility (as a percent)   70.18%
Expected life (in years) 5 years 6 years
Maximum    
Class of Warrant or Right [Line Items]    
Risk-free interest rate (as a percent) 1.95%  
Volatility (as a percent)   70.44%
Expected life (in years) 6 years 3 months 6 years 3 months