| Line Item | Dec 31, 2025 | Dec 31, 2024 | Dec 31, 2023 | Dec 31, 2022 | Dec 31, 2021 | Dec 31, 2020 | Dec 31, 2019 | Dec 31, 2018 |
|---|---|---|---|---|---|---|---|---|
| Remeasurement of secured notes | ||||||||
| Corporate and administrative expenses | ||||||||
| Foreign exchange gain (loss) | ||||||||
| Other income - flow-through shares | ||||||||
| Interest income | ||||||||
| Finance costs and other | ||||||||
| Environmental rehabilitation expense | — | |||||||
| Loss before income taxes | ||||||||
| Income tax recovery (expense) | ||||||||
| Net loss |