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Related party transactions - Summary of Compensation Paid or Payable to Key Management (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Disclosure of transactions between related parties [abstract]    
Salaries and other short-term employee benefits $ 8,557 $ 6,364
Employee benefit plan 377 337
Share-based payments 6,626 8,468
Termination benefits 441 0
Compensation for key management personnel $ 16,001 $ 15,169