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Stock-Based Compensation - Valuation (Details) - Employee Stock Option
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Black-Scholes option with following assumptions:    
Expected stock price volatility (as a percent) 92.00% 92.00%
Expected option term 6 years 6 years
Risk-free interest rate, minimum (as a percent) 4.00% 3.70%
Risk-free interest rate, maximum (as a percent) 4.30% 4.00%
Expected dividend yield (as a percent) 0.00% 0.00%