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Warrants to Purchase Common Stock - Measurement Inputs (Details)
Sep. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Dividend yield      
Class of Warrant or Right [Line Items]      
Measurement input (percent) 0.0000   0.0000
Expected volatility      
Class of Warrant or Right [Line Items]      
Measurement input (percent) 0.4993   0.4993
Risk-free interest rate      
Class of Warrant or Right [Line Items]      
Measurement input (percent) 0.0031   0.0017
Common Stock Warrants      
Class of Warrant or Right [Line Items]      
Warrant term (in years)   4 years 5 years
September 2020 Common Stock Warrants      
Class of Warrant or Right [Line Items]      
Warrant term (in years)     5 years
September 2020 Common Stock Warrants | Dividend yield      
Class of Warrant or Right [Line Items]      
Measurement input (percent)     0.000
September 2020 Common Stock Warrants | Expected volatility      
Class of Warrant or Right [Line Items]      
Measurement input (percent)     0.500
September 2020 Common Stock Warrants | Risk-free interest rate      
Class of Warrant or Right [Line Items]      
Measurement input (percent)     0.003
March 2021 Common Stock Warrants      
Class of Warrant or Right [Line Items]      
Warrant term (in years) 4 years    
March 2021 Common Stock Warrants | Dividend yield      
Class of Warrant or Right [Line Items]      
Measurement input (percent) 0.000    
March 2021 Common Stock Warrants | Expected volatility      
Class of Warrant or Right [Line Items]      
Measurement input (percent) 0.500    
March 2021 Common Stock Warrants | Risk-free interest rate      
Class of Warrant or Right [Line Items]      
Measurement input (percent) 0.006