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Stock-Based Compensation - Assumptions Used for Fair Value of Stock Options (Details) - Stock options
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Assumptions used to determine fair value of stock options    
Expected dividend yield 0.00% 0.00%
Risk-free rate, minimum 3.50% 1.60%
Risk-free rate, maximum 4.70% 4.30%
Volatility, minimum 119.00% 116.00%
Volatility, maximum 123.00% 126.00%
Minimum    
Assumptions used to determine fair value of stock options    
Expected option term 6 years 2 months 12 days 6 years 2 months 12 days
Maximum    
Assumptions used to determine fair value of stock options    
Expected option term 6 years 3 months 18 days 10 years