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Loans and borrowings (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Loans and borrowings |  |
Current | $ 42,545 | $ 786
Non-current | 383,362 |
Total | 425,907 | 786
Senior Syndicated Facility Agreement |  |
Loans and borrowings |  |
Current | 29,590 |
Non-current | 165,531 |
Copper Purchase Agreement |  |
Loans and borrowings |  |
Current | 493 |
Non-current | 79,366 |
Silver Purchase Agreement |  |
Loans and borrowings |  |
Current | 12,462 |
Non-current | 62,802 |
Promissory note - related party |  |
Loans and borrowings |  |
Current |  | $ 786
Mezzanine Debt Facility |  |
Loans and borrowings |  |
Non-current | $ 75,663 |

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