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Mine standby costs (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Disclosure of other income & finance costs [Line Items] |  |
Mine standby costs | $ 15,433 | $ 13,665
Stratoni |  |
Disclosure of other income & finance costs [Line Items] |  |
Mine standby costs | 7,168 | 0
Skouries |  |
Disclosure of other income & finance costs [Line Items] |  |
Mine standby costs | 5,785 | 8,890
Lamaque |  |
Disclosure of other income & finance costs [Line Items] |  |
Mine standby costs | 0 | 3,086
Other Mine Location |  |
Disclosure of other income & finance costs [Line Items] |  |
Mine standby costs | $ 2,480 | $ 1,689

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