v3.26.3
Stock options, retention securities and warrants - Fair value of options granted (Details) - Y
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Minimum    
Stock options, retention securities and warrants    
Risk-free interest rate 2.72% 3.02%
Expected term in years 4 5
Expected stock price volatility 65.70% 68.60%
Maximum    
Stock options, retention securities and warrants    
Risk-free interest rate 3.19% 3.76%
Expected term in years 9.2 10
Expected stock price volatility 73.70% 70.00%