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Stock-Based Compensation - Weighted Average Assumptions (Details) - Stock Options - Employees and Directors
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Risk-free interest rate 4.11% 3.21% 4.05% 2.05%
Expected volatility 101.00% 97.00% 100.00% 94.00%
Expected life in years 5 years 7 months 6 days 5 years 7 months 6 days 5 years 6 months 5 years 8 months 12 days
Dividend yield 0.00% 0.00% 0.00% 0.00%