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Stock-Based Compensation - Stock Option Valuation Assumptions (Details) - Employee Stock Option - $ / shares
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Risk-free interest rate 3.24% 4.30%
Expected volatility factor 133.00% 153.00%
Expected option life (years) 6 years 6 years
Weighted-average fair value (in USD per share) $ 0.63 $ 1.41