Quarterly report pursuant to Section 13 or 15(d)

Warrants and Derivative Liabilities - Schedule of Input and Valuation Technique Used to Value Warrant Liabilities (Details)

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Warrants and Derivative Liabilities - Schedule of Input and Valuation Technique Used to Value Warrant Liabilities (Details) - 2018 Emerald Financing Warrants
Mar. 31, 2022
$ / shares
Dec. 31, 2021
$ / shares
Class of Warrant or Right [Line Items]    
Underlying common stock price (in dollars per share) $ 0.04 $ 0.05
Dividend yield    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input 0 0
Volatility factor    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input 1.033 1.265
Risk-free interest rate    
Class of Warrant or Right [Line Items]    
Warrants and rights outstanding measurement input 0.0149 0.0043
Expected term (years)    
Class of Warrant or Right [Line Items]    
Expected term (years) 10 months 17 days 1 year 1 month 17 days