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Stock-Based Compensation - Assumptions Used to Estimate Fair Value of Stock Options (Details)
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Stock-Based Compensation    
Risk-free interest rate, minimum 3.50% 2.10%
Risk-free interest rate, maximum 3.60% 2.30%
Volatility, minimum 73.00% 72.80%
Volatility, maximum   76.80%
Dividend yield 0.00% 0.00%
Minimum    
Stock-Based Compensation    
Expected life (years) 4 years 2 months 12 days 4 years 2 months 12 days
Maximum    
Stock-Based Compensation    
Expected life (years) 5 years 2 months 12 days 5 years 2 months 12 days