Exploration and evaluation assets and mining data - Schedule of Exploration and Evaluation Assets and Mining Data (Details) - USD ($) |
9 Months Ended | 12 Months Ended |
|---|---|---|
Sep. 30, 2026 |
Dec. 31, 2025 |
|
| Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items] | ||
| Beginning balance | $ 140,986,596 | $ 117,577,523 |
| Additions | 31,329,208 | 23,409,073 |
| Ending balance | 172,315,804 | 140,986,596 |
| Exploration and evaluation assets | ||
| Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items] | ||
| Beginning balance | 128,240,461 | 104,831,388 |
| Additions | 31,329,208 | 23,409,073 |
| Ending balance | 159,569,669 | 128,240,461 |
| Mining data | ||
| Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items] | ||
| Beginning balance | 12,746,135 | 12,746,135 |
| Additions | 0 | 0 |
| Ending balance | $ 12,746,135 | $ 12,746,135 |