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Investments in associates and joint venture - Statements of profit or loss of Tinka under IFRS (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of Investments in associates [Line Items]      
Sales of goods $ 801,199 $ 863,470 $ 637,619
Net loss 602,935 (262,804) (150,339)
Share in results 176,270 240,450 62,702
Tinka resources Ltd      
Disclosure of Investments in associates [Line Items]      
Sales of goods 0 0 0
Net loss (4,383) (1,109) (2,311)
Adjustments to conform to the accounting policies (8,283) (4,583) (2,189)
Net loss, adjusted (12,666) (5,692) (4,500)
Share in results (2,447) (1,098) $ (868)
Total market capitalization of shares $ 11,000 $ 11,000  
Market capitalization value by each share $ 0.14 $ 0.16