Annual report pursuant to Section 13 and 15(d)

Warrants and Derivative Liabilities (Details 4)

v3.20.1
Warrants and Derivative Liabilities (Details 4) - Emerald Financing Warrant Liability
Dec. 31, 2019
$ / shares
Dec. 31, 2018
$ / shares
Feb. 16, 2018
USD_per_warrants
$ / shares
Jan. 19, 2018
$ / shares
Class of Warrant or Right [Line Items]        
Expected Term (years)     5 years 5 years
Monte Carlo simulations        
Class of Warrant or Right [Line Items]        
Underlying common stock price $ 0.13 $ 0.40    
Monte Carlo simulations | Minimum        
Class of Warrant or Right [Line Items]        
Underlying common stock price     $ 0.29 $ 0.29
Monte Carlo simulations | Maximum        
Class of Warrant or Right [Line Items]        
Underlying common stock price     $ 0.30 $ 0.30
Dividend yield | Monte Carlo simulations        
Class of Warrant or Right [Line Items]        
Warrants and rights outstanding measurement input (in percent) 0 0 0 0
Volatility factor | Monte Carlo simulations        
Class of Warrant or Right [Line Items]        
Warrants and rights outstanding measurement input (in percent) 79.5   70.0 70.0
Volatility factor | Monte Carlo simulations | Minimum        
Class of Warrant or Right [Line Items]        
Warrants and rights outstanding measurement input (in percent)   92.1    
Volatility factor | Monte Carlo simulations | Maximum        
Class of Warrant or Right [Line Items]        
Warrants and rights outstanding measurement input (in percent)   92.4    
Risk-free interest rate | Monte Carlo simulations        
Class of Warrant or Right [Line Items]        
Warrants and rights outstanding measurement input (in percent) 1.62 2.49    
Risk-free interest rate | Monte Carlo simulations | Minimum        
Class of Warrant or Right [Line Items]        
Warrants and rights outstanding measurement input (in percent)     2.45 2.45
Risk-free interest rate | Monte Carlo simulations | Maximum        
Class of Warrant or Right [Line Items]        
Warrants and rights outstanding measurement input (in percent)     2.60 2.60
Expected term (years) | Monte Carlo simulations        
Class of Warrant or Right [Line Items]        
Expected Term (years) 3 years 1 month 17 days   5 years 5 years
Expected term (years) | Monte Carlo simulations | Minimum        
Class of Warrant or Right [Line Items]        
Expected Term (years)   4 years 18 days    
Expected term (years) | Monte Carlo simulations | Maximum        
Class of Warrant or Right [Line Items]        
Expected Term (years)   4 years 1 month 17 days