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Warrants to Acquire Shares of Common Stock - Fair Value of Warrants is Estimated Using Black-Scholes Option Pricing Model (Details)
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Risk free interest rate      
Class of Warrant or Right [Line Items]      
Warrants, measurement input 0.0065 0.0016  
Volatility      
Class of Warrant or Right [Line Items]      
Warrants, measurement input 1.3104 1.5038  
Expected term (years)      
Class of Warrant or Right [Line Items]      
Warrants, measurement input 1.75 2.75  
Expected dividend yield      
Class of Warrant or Right [Line Items]      
Warrants, measurement input 0 0  
Strike price      
Class of Warrant or Right [Line Items]      
Warrants, measurement input 7.50   7.50