| Line Item | Aug 31, 2026 | May 31, 2026 | Feb 28, 2026 | Nov 30, 2025 | Aug 31, 2025 | May 31, 2025 | Feb 28, 2025 | Nov 30, 2024 | Aug 31, 2024 | May 31, 2024 | Feb 29, 2024 | Nov 30, 2023 | Aug 31, 2023 | May 31, 2023 | Feb 28, 2023 | Nov 30, 2022 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Operating expenses: | ||||||||||||||||
| General & administrative (Note 11) | ||||||||||||||||
| Equity loss – Donlin Gold (Note 5) | ||||||||||||||||
| Operating Expenses | ||||||||||||||||
| Loss from operations | ||||||||||||||||
| Other (expense) income: | — | |||||||||||||||
| Interest expense - promissory note (Note 7) | ||||||||||||||||
| Interest income | ||||||||||||||||
| Other (expense) income, net (Note 12) | ||||||||||||||||
| Net loss | ||||||||||||||||
| Net loss per common share – basic and diluted (in dollars per share) | — |