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Other current and non-current non-financial assets - Conciliation of Explorations in Execution (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Other current and non-current non-financial assets    
Opening balance $ 1,000 $ 2,666
Disbursements 4,227 1,736
Reclassifications (1,528) (3,402)
Total changes 2,699 (1,666)
Total $ 3,699 $ 1,000