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Lease liability - Summary of Leases (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Disclosure of detailed information about property, plant and equipment [line items]    
Current lease liabilities $ 3,238 $ 2,691
Non-current lease liabilities 13,882 15,182
Total lease liabilities 17,120 17,873
Property    
Disclosure of detailed information about property, plant and equipment [line items]    
Current lease liabilities 3,117 2,613
Non-current lease liabilities 13,647 15,017
Equipment    
Disclosure of detailed information about property, plant and equipment [line items]    
Current lease liabilities 38 29
Non-current lease liabilities 105 98
Vehicle    
Disclosure of detailed information about property, plant and equipment [line items]    
Current lease liabilities 83 49
Non-current lease liabilities $ 130 $ 67