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Share-based compensation - Components (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Share-based compensation $ 1,000 $ 745 $ 3,624 $ 1,662
Stock options        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Share-based compensation 607 443 1,655 1,103
DSUs        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Share-based compensation 233 231 632 488
RSUs        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Share-based compensation 124 0 1,225 0
ESPP        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Share-based compensation $ 36 $ 71 $ 112 $ 71