| Schedule of disaggregation of revenue |
| | Three months ended September 30, 2026 | | | Three months ended September 30, 2025 | | | Nine months ended September 30, 2026 | | | Nine months ended September 30, 2025 | | Concentrate sales | | $ | 31,582 | | | $ | 21,425 | | | $ | 105,588 | | | $ | 59,127 | | Provisional pricing adjustments | | | 1,803 | | | | (383 | ) | | | (5,983 | ) | | | 2,556 | | | | $ | 33,385 | | | $ | 21,042 | | | $ | 99,605 | | | $ | 61,683 | |
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| Schedule of cost of sales |
| | Three months ended September 30, 2026 | | | Three months ended September 30, 2025 | | | Nine months ended September 30, 2026 | | | Nine months ended September 30, 2025 | | Production costs | | $ | 16,855 | | | $ | 9,992 | | | $ | 41,943 | | | $ | 27,963 | | Write down of equipment and materials and supplies inventory | | | 31 | | | | 249 | | | | 49 | | | | 413 | | Depreciation and depletion | | | 1,667 | | | | 896 | | | | 6,392 | | | | 2,616 | | | | $ | 18,553 | | | $ | 11,137 | | | $ | 48,384 | | | $ | 30,992 | |
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