Annual report pursuant to Section 13 and 15(d)

Warrants and Derivative Liabilities (Details 1)

v3.20.4
Warrants and Derivative Liabilities (Details 1) - Black-Scholes option pricing model
Dec. 31, 2020
$ / shares
Dec. 31, 2019
$ / shares
2020 Common Stock Warrants | Dividend yield    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input (in percent) 0  
2020 Common Stock Warrants | Volatility factor    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input (in percent) 91.64  
2020 Common Stock Warrants | Risk-free interest rate    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input (in percent) 0.19  
2020 Common Stock Warrants | Expected term (years)    
Class of Warrant or Right [Line Items]    
Expected Term 5 years  
2020 Common Stock Warrants | Underlying common stock price    
Class of Warrant or Right [Line Items]    
Underlying common stock price $ 0.05  
Pre-funded Warrants | Dividend yield    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input (in percent) 0  
Pre-funded Warrants | Volatility factor    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input (in percent) 93.86  
Pre-funded Warrants | Risk-free interest rate    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input (in percent) 0.52  
Pre-funded Warrants | Expected term (years)    
Class of Warrant or Right [Line Items]    
Expected Term 10 years  
Pre-funded Warrants | Underlying common stock price    
Class of Warrant or Right [Line Items]    
Underlying common stock price $ 0.05  
Placement agent warrants | Dividend yield    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input (in percent) 0  
Placement agent warrants | Volatility factor    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input (in percent) 91.64  
Placement agent warrants | Risk-free interest rate    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input (in percent) 0.19  
Placement agent warrants | Expected term (years)    
Class of Warrant or Right [Line Items]    
Expected Term 4 years 11 months 26 days  
Placement agent warrants | Underlying common stock price    
Class of Warrant or Right [Line Items]    
Underlying common stock price $ 0.05  
2019 Common Stock Warrants    
Class of Warrant or Right [Line Items]    
Underlying common stock price   $ 0.22
2019 Common Stock Warrants | Dividend yield    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input (in percent)   0
2019 Common Stock Warrants | Volatility factor    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input (in percent)   93.08
2019 Common Stock Warrants | Risk-free interest rate    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input (in percent)   1.62
2019 Common Stock Warrants | Expected term (years)    
Class of Warrant or Right [Line Items]    
Expected Term   5 years