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Intangible assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]    
Opening net book value $ 1,898 $ 2,409
Additions 561 350
Foreign exchange 5 20
Amortization (1,029) (881)
Closing net book value 1,435 1,898
Cost 5,346 4,789
Accumulated amortization (3,911) (2,891)
Net book value 1,435 1,898
Exclusive license agreement    
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]    
Opening net book value 186 205
Foreign exchange 1 2
Amortization (22) (21)
Closing net book value 165 186
Cost 231 231
Accumulated amortization (66) (45)
Net book value 165 186
Software    
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]    
Opening net book value 362 67
Additions 561 350
Foreign exchange (5) 4
Amortization (148) (59)
Closing net book value 770 362
Cost 978 421
Accumulated amortization (208) (59)
Net book value 770 362
Proprietary technology    
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]    
Opening net book value 1,128 1,785
Foreign exchange 7 12
Amortization (718) (669)
Closing net book value 417 1,128
Cost 3,456 3,456
Accumulated amortization (3,039) (2,328)
Net book value 417 1,128
Brand    
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]    
Opening net book value 222 352
Foreign exchange 2 2
Amortization (141) (132)
Closing net book value 83 222
Cost 681 681
Accumulated amortization (598) (459)
Net book value $ 83 $ 222