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Stock-based compensation - Schedule of Return Target and Service Based Options Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2025
Dec. 31, 2024
Target-based stock options    
Options    
Outstanding, beginning of period (in shares) 2,265,275  
Exercised (in shares) 0  
Outstanding, end of period (in shares) 2,265,275 2,265,275
Options exercisable (in shares) 2,265,275  
Vested or expected to vest (in shares) 2,265,275  
Weighted-Average Exercise Price    
Outstanding, beginning of period (in dollars per share) $ 6.66  
Exercised (in dollars per share) 0  
Outstanding, end of period (in dollars per share) 6.66 $ 6.66
Options exercisable (in dollars per share) 6.66  
Vested or expected to vest (in dollars per share) $ 6.66  
Weighted-Average Remaining Contractual Term (Years)    
Remaining term, options outstanding (in years) 3 years 6 months 3 years 8 months 12 days
Remaining term, options exercisable (in years) 3 years 6 months  
Remaining term, options vested or expected to vest (in years) 3 years 6 months  
Aggregate Intrinsic Value (in thousands)    
Outstanding $ 12,436 $ 16,740
Exercised 0  
Options exercisable 12,436  
Vested or expected to vest $ 12,436  
Service-based stock option    
Options    
Outstanding, beginning of period (in shares) 757,343  
Exercised (in shares) 0  
Outstanding, end of period (in shares) 757,343 757,343
Options exercisable (in shares) 757,343  
Vested or expected to vest (in shares) 757,343  
Weighted-Average Exercise Price    
Outstanding, beginning of period (in dollars per share) $ 5.52  
Exercised (in dollars per share) 0  
Outstanding, end of period (in dollars per share) 5.52 $ 5.52
Options exercisable (in dollars per share) 5.52  
Vested or expected to vest (in dollars per share) $ 5.52  
Weighted-Average Remaining Contractual Term (Years)    
Remaining term, options outstanding (in years) 2 years 8 months 12 days 3 years
Remaining term, options exercisable (in years) 2 years 8 months 12 days  
Remaining term, options vested or expected to vest (in years) 2 years 8 months 12 days  
Aggregate Intrinsic Value (in thousands)    
Outstanding $ 5,025 $ 6,464
Exercised 0  
Options exercisable 5,025  
Vested or expected to vest $ 5,025