v3.26.1
Share-based compensation plan (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
shares
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
shares
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
individual
$ / shares
shares
Dec. 31, 2024
USD ($)
individual
$ / shares
shares
Share-based compensation plan            
Common shares available for issuance (in shares) | shares 44,915,612   44,915,612   44,915,612 3,565,235
Award vesting period     4 years   4 years  
Long Term Incentive Plan 2026            
Share-based compensation plan            
Threshold percentage of common stock reserved 15.00%   15.00%      
Stock options granted (in shares) | shares     0      
Equity awards other than options granted in period | shares     0      
Common Class B            
Share-based compensation plan            
Percentage of possible increase in the fair value per share     20.00%      
Percentage of possible decrease in the fair value per share     (20.00%)      
Increase estimated fair value of the share-based compensation liability     $ 4,700      
Decrease estimated fair value of the share-based compensation liability     (4,700)      
Equity classified stock options            
Share-based compensation plan            
Incremental share-based compensation         $ 21  
Aggregate intrinsic value of stock options $ 6,899   6,899   5,545 $ 3,966
Aggregate intrinsic value of stock options exercised     30   19 140
Share-based compensation expense 224 $ 233 $ 329 $ 528 $ 1,345 $ 1,253
Stock options granted (in shares) | shares     2,800,000   4,127,700 94,500
Unamortized compensation cost to unvested stock options         $ 1,227 $ 2,107
Weighted-average remaining period         1 year 9 months 18 days  
Grant date fair value of stock options         $ 1,208 1,152
Grant date fair value of stock options forfeited         $ 482 $ 53
Weighted average fair value common share options (in dollars per share) | $ / shares         $ 0.09 $ 8.4
Liability classified stock options            
Share-based compensation plan            
Aggregate intrinsic value of stock options $ 36,355   $ 36,355   $ 26,408 $ 0
Share-based compensation expense         $ 3,235 $ 2,629
Stock options granted (in shares) | shares     11,496,500   22,203,841 312,250
Unamortized compensation cost to unvested stock options         $ 14,111 $ 7,036
Weighted-average remaining period         2 years 1 month 6 days  
Grant date fair value of stock options         $ 3,499 $ 3,085
Number of individuals received awards | individual         110 134
Maximum            
Share-based compensation plan            
Maximum exercise periods     15 years   15 years