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Financial assets and liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Fair value through profit or loss.    
Financial assets and liabilities    
Financial liabilities $ 161 $ 549
Financial liabilities at amortized cost    
Financial assets and liabilities    
Financial liabilities 4,557 5,058
Accounts payable and accrued liabilities | Financial liabilities at amortized cost    
Financial assets and liabilities    
Financial liabilities 3,180 3,382
Other Liabilities | Fair value through profit or loss.    
Financial assets and liabilities    
Financial liabilities   99
Lease Liabilities | Financial liabilities at amortized cost    
Financial assets and liabilities    
Financial liabilities 1,377 1,676
Derivative financial instrument | Fair value through profit or loss.    
Financial assets and liabilities    
Financial liabilities   450
Derivative financial instrument | Financial liabilities at amortized cost    
Financial assets and liabilities    
Financial liabilities 161  
Financial assets at amortized cost    
Financial assets and liabilities    
Financial assets 72,186 91,344
Cash | Financial assets at amortized cost    
Financial assets and liabilities    
Financial assets 67,152 83,913
Trade and Other receivables | Financial assets at amortized cost    
Financial assets and liabilities    
Financial assets 5,034 7,431
Foreign currency risk | Accounts payable and accrued liabilities    
Financial assets and liabilities    
Financial liabilities 3,180 3,382
Foreign currency risk | Other Liabilities    
Financial assets and liabilities    
Financial liabilities   99
Foreign currency risk | Lease Liabilities    
Financial assets and liabilities    
Financial liabilities 1,377 1,676
Foreign currency risk | Cash    
Financial assets and liabilities    
Financial assets 67,152 83,913
Foreign currency risk | Trade and Other receivables    
Financial assets and liabilities    
Financial assets $ 5,034 $ 7,431