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Other non-financial assets - Additional information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Other Assets [Line Items]    
Opening balance $ 25,196 $ 26,503
Closing balance 23,845 25,196
Gross carrying amount [Member]    
Other Assets [Line Items]    
Opening balance 39,583 39,243
Additions 290 357
Disposals   (17)
Closing balance 39,873 39,583
Accumulated depreciation, amortisation and impairment [member]    
Other Assets [Line Items]    
Opening balance 14,387 12,740
Additions 1,641 1,647
Transfers   0
Closing balance 16,028 14,387
Patents And Industrial Property [Member] | Gross carrying amount [Member]    
Other Assets [Line Items]    
Opening balance 15,001 14,709
Additions 215 292
Disposals   0
Closing balance 15,216 15,001
Rights-of-use [member] | Gross carrying amount [Member]    
Other Assets [Line Items]    
Opening balance 13,720 13,720
Additions 0 0
Disposals   0
Closing balance 13,720 13,720
Rights-of-use [member] | Accumulated depreciation, amortisation and impairment [member]    
Other Assets [Line Items]    
Opening balance 8,883 8,165
Additions 705 718
Transfers   0
Closing balance 9,588 8,883
Software licenses [member] | Gross carrying amount [Member]    
Other Assets [Line Items]    
Opening balance 10,862 10,814
Additions 75 65
Disposals   (17)
Closing balance 10,937 10,862
Software licenses [member] | Accumulated depreciation, amortisation and impairment [member]    
Other Assets [Line Items]    
Opening balance 5,504 4,575
Additions 936 929
Transfers   0
Closing balance $ 6,440 $ 5,504