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Stock-based compensation - Share options plan (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
CAD ($)
shares
Dec. 31, 2021
CAD ($)
shares
Dec. 31, 2021
$ / shares
shares
Nov. 17, 2021
shares
Number of options        
Exercised (in shares)   (125,000)    
Weighted-average exercise price $ per share        
Proceeds from options exercised | $ $ 0 $ 519    
Share option plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares received per stock option (in shares) 1      
Expiration period 10 years      
Shares issued or outstanding (in shares)   0 0 0
Number of options        
Beginning balance (in shares) 0 125,000    
Exercised (in shares)   (125,000)    
Ending balance (in shares)   0    
Weighted-average exercise price $ per share        
Beginning balance (CAD per share) | $ / shares     $ 4.16  
Exercised (CAD per share) | $ / shares     4.16  
Ending balance (CAD per share) | $ / shares     $ 0  
Proceeds from options exercised | $   $ 519    
Total intrinsic value of options exercised | $   $ 1,909