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Financial risk management objectives and policies - Liquidity risk (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Disclosure of financial liabilities [line items]    
Long-term debt $ 53,577 $ 35,505
Lease liabilities 509 952
Accrued liabilities and other payables 5,814 3,497
Trade accounts payables 3,548 1,100
Current portion of fair value of derivative financial instruments 0 92
Total financial liabilities 63,448 41,146
Less than 3 months [member]    
Disclosure of financial liabilities [line items]    
Long-term debt 2,495 1,566
Lease liabilities 80 92
Accrued liabilities and other payables 5,814 3,497
Trade accounts payables 3,548 1,100
Current portion of fair value of derivative financial instruments   23
Total financial liabilities 11,937 6,278
3 to 12 months [member]    
Disclosure of financial liabilities [line items]    
Long-term debt 7,266 4,614
Lease liabilities 241 275
Accrued liabilities and other payables 0 0
Trade accounts payables 0 0
Current portion of fair value of derivative financial instruments   69
Total financial liabilities 7,507 4,958
1 to 5 years [member]    
Disclosure of financial liabilities [line items]    
Long-term debt 43,816 29,325
Lease liabilities 188 585
Accrued liabilities and other payables 0 0
Trade accounts payables 0 0
Current portion of fair value of derivative financial instruments   0
Total financial liabilities 44,004 29,910
More than 5 years [member]    
Disclosure of financial liabilities [line items]    
Long-term debt 0 0
Lease liabilities 0 0
Accrued liabilities and other payables 0 0
Trade accounts payables 0 0
Current portion of fair value of derivative financial instruments   0
Total financial liabilities $ 0 $ 0