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Share capital (Details)
$ / shares in Units, $ in Thousands
 9 Months Ended
Apr. 28, 2022
$ / shares
shares
Apr. 28, 2022
$ / shares
shares
Sep. 30, 2022
USD ($)
shares
Sep. 30, 2021
USD ($)
shares
Number of shares        
Stock option exercise (in shares) | shares     9,179 147,025
Amount        
Balance at beginning of period     $ 266,119  
Stock option exercise     88 $ 388
RSU release     0  
Issuance of common shares related to contingent consideration     700  
Share issuance under employee share purchase plan     636 $ 244
Balance at end of period     $ 267,926  
Common shares        
Number of shares        
Balance at beginning of period (in shares) | shares     32,857,422 32,630,536
Stock option exercise (in shares) | shares     9,179 147,025
Release of RSUs (in shares) | shares     2,800  
Issuance of common shares related to contingent consideration (in shares) | shares 15,364 15,364 15,364  
Share issuance under employee share purchase plan (in shares) | shares     20,814 4,945
Balance at end of period (in shares) | shares     32,905,579 32,782,506
Amount        
Balance at beginning of period     $ 266,119  
Stock option exercise     151 $ 548
RSU release     194  
Issuance of common shares related to contingent consideration     700  
Share issuance under employee share purchase plan     762 $ 292
Balance at end of period     $ 267,926  
Shares issued based on the fair value (in usd and cad per share) | (per share) $ 45.55 $ 58.47