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Stock-Based Compensation - Stock Option Valuation (Details) - Exercise of outstanding stock options
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Assumptions used to determine the fair value of stock options granted    
Risk‑free interest rate 3.59% 4.05%
Expected volatility 85.00% 78.00%
Expected dividend yield 0.00% 0.00%
Expected term (in years) 6 years 29 days 6 years 29 days