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Stock-Based Compensation - Options, Assumptions Under Black-Scholes (Details) - Board members
3 Months Ended
Mar. 31, 2022
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Expected volatility 71.47%
Expected volatility 75.15%
Risk-free interest rate 1.02%
Risk-free interest rate 1.06%
Annual dividend yield 0.00%
Forfeiture rate 0.00%
Minimum  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Expected term 2 years
Market value of common stock (in dollars per share) $ 20.23
Maximum  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Expected term 2 years 3 months
Market value of common stock (in dollars per share) $ 22.73