Annual report pursuant to Section 13 and 15(d)

Warrants and Derivative Liabilities (Details 6)

v3.20.1
Warrants and Derivative Liabilities (Details 6) - Black Scholes Merton Option Pricing Model - Series B Warrant Liability
Dec. 31, 2019
$ / shares
Dec. 31, 2018
$ / shares
Class of Warrant or Right [Line Items]    
Underlying common stock price $ 0.13 $ 0.40
Dividend yield    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input (in percent) 0 0
Volatility factor    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input (in percent) 79.2 93.0
Risk-free interest rate    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input (in percent) 1.60 2.79
Expected term (years)    
Class of Warrant or Right [Line Items]    
Expected Term (years) 7 months 20 days  
Expected term (years) | Minimum    
Class of Warrant or Right [Line Items]    
Expected Term (years)   1 year 7 months 20 days
Expected term (years) | Maximum    
Class of Warrant or Right [Line Items]    
Expected Term (years)   1 year 7 months 24 days