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Stock-Based Compensation - Valuation (Details) - Employee Stock Option
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Black-Scholes option with following assumptions:        
Expected stock price volatility (as a percent) 76.00% 82.00%    
Expected stock price volatility, minimum (as a percent)     76.00% 82.00%
Expected stock price volatility, maximum (as a percent)     81.00% 93.00%
Expected option term 6 years 6 years 6 years 6 years
Risk-free interest rate, minimum (as a percent) 4.00% 3.50% 4.00% 3.50%
Risk-free interest rate, maximum (as a percent) 4.20% 4.30% 4.70% 4.50%
Expected dividend yield (as a percent) 0.00% 0.00% 0.00% 0.00%