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Mine standby costs (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Disclosure of other income & finance costs [Line Items]    
Mine standby costs $ 11,269 $ 16,106
Stratoni    
Disclosure of other income & finance costs [Line Items]    
Mine standby costs 6,836 11,507
Other mine standby costs    
Disclosure of other income & finance costs [Line Items]    
Mine standby costs $ 4,433 $ 4,599