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Shareholders' capital - Schedule of Stock Option Activity (Details) - $ / shares
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Number of awards      
Beginning balance (in shares) 2,667,725 2,626,780  
Granted (in shares) 0 1,368,744  
Exercised (in shares) 0 0  
Forfeited (in shares) (622,646) (1,327,799)  
Ending balance (in shares) 2,045,079 2,667,725 2,626,780
Exercisable (in shares) 1,873,957    
Weighted average exercise price      
Beginning balance (in USD per share) $ 14.71 $ 16.02  
Granted (in USD per share) 0 10.76  
Exercised (in USD per share) 0 0  
Forfeited (in USD per share) 15.12 16.55  
Ending balance (in USD per share) 14.93 $ 14.71 $ 16.02
Exercisable (in USD per share) $ 15.34    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract]      
Outstanding shares, weighted average remaining contractual term 3 years 11 months 12 days 5 years 2 months 4 days 5 years 7 months 17 days
Granted, weighted average remaining contractual term   7 years 2 months 26 days  
Exercisable , weighted average remaining contractual term 3 years 8 months 23 days