Condensed Consolidated Interim Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|---|
Aug. 31, 2026 |
May 31, 2026 |
Feb. 28, 2026 |
Aug. 31, 2025 |
May 31, 2025 |
Feb. 28, 2025 |
Aug. 31, 2026 |
Aug. 31, 2025 |
Nov. 30, 2025 |
|
| Net loss | $ (36,039) | $ (25,493) | $ (15,435) | $ (15,646) | $ (54,275) | $ (9,116) | $ (76,967) | $ (79,037) | |
| Equity loss – Donlin Gold (Note 5) | (23,965) | (7,450) | (47,049) | (16,212) | |||||
| Share-based compensation (Note 13) | 2,277 | 2,000 | 6,428 | 4,393 | |||||
| Other (expense) income: | (0) | (0) | (0) | 39,607 | |||||
| Interest expense on promissory note | 3,857 | 3,827 | 11,210 | 11,100 | $ 14,774 | ||||
| Change in fair value of marketable securities (Note 12) | 27 | 662 | 1,373 | 945 | |||||
| Foreign exchange (gain) loss | (6) | 8 | 80 | (41) | |||||
| Other operating adjustments | (1) | 3 | 10 | 18 | |||||
| Other assets | 1,796 | (1,668) | 4,034 | (502) | |||||
| Accounts payable and accrued liabilities | 3,883 | (196) | 3,285 | 854 | |||||
| Accrued payroll and related benefits | 707 | 703 | (340) | (357) | |||||
| Income taxes payable | 0 | (6) | 0 | (220) | |||||
| Remediation liability | (93) | (36) | (112) | (160) | |||||
| Net cash used in operating activities | (3,261) | (903) | (14,924) | (7,992) | |||||
| Proceeds from term deposits | 125,000 | 92,000 | 130,000 | 185,000 | |||||
| Purchases of term deposits | (30,000) | (134,000) | (322,000) | (193,000) | |||||
| Funding of Donlin Gold | (24,828) | (8,100) | (56,700) | (18,513) | |||||
| Investment in Donlin Gold (Note 5) | (0) | 210,050 | (0) | 210,050 | |||||
| Proceeds from sale of marketable securities | 1,248 | 0 | 5,865 | 952 | |||||
| Net cash used in investing activities | 71,420 | (260,150) | (242,835) | (235,611) | |||||
| Proceeds from issuance of equity (Note 9) | 0 | 26,915 | 310,200 | 270,754 | |||||
| Payments for costs related to equity issuance (Note 9) | (0) | 1,434 | 16,200 | 11,168 | |||||
| Payments of withholding tax on share-based compensation | (0) | (0) | (0) | 82 | |||||
| Net cash provided by (used in) financing activities | 0 | 25,481 | 294,000 | 259,504 | |||||
| Effect of exchange rate changes on cash and cash equivalents | 11 | 5 | 2 | 44 | |||||
| Net change in cash and cash equivalents | 68,170 | (235,567) | 36,243 | 15,945 | |||||
| Cash and cash equivalents at beginning of period | 78,216 | $ 110,143 | 293,736 | $ 42,224 | 110,143 | 42,224 | 42,224 | ||
| Cash and cash equivalents at end of period | 146,386 | $ 78,216 | 58,169 | $ 293,736 | 146,386 | 58,169 | $ 110,143 | ||
| Supplemental disclosures of cash flow information: | |||||||||
| Interest and dividends received | 2,477 | 1,956 | 4,725 | 3,871 | |||||
| Income taxes paid | $ 0 | $ 0 | $ 0 | $ 223 | |||||
| X | ||||||||||
- Definition The increase (decrease) during the reporting period in remediation liability. No definition available.
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- Definition The cash outflow associated with the additional investment in or advances to an entity in which the reporting entity shares control of the entity with another party or group. No definition available.
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- Definition Amount of cash inflow for receipts of term deposits. No definition available.
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- Definition Amount of expense related to warrants. No definition available.
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- Definition Amount of cash and cash equivalent, and cash and cash equivalent restricted to withdrawal or usage; including, but not limited to, discontinued operation. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of increase (decrease) in cash and cash equivalent, and cash and cash equivalent restricted to withdrawal or usage; including effect from exchange rate change and including, but not limited to, discontinued operation. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of increase (decrease) from effect of exchange rate change on cash and cash equivalent, and cash and cash equivalent restricted to withdrawal or usage; held in foreign currency; including, but not limited to, discontinued operation. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, before tax, of realized and unrealized gain (loss) from foreign currency transaction. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of income (loss) for proportionate share of equity method investee's income (loss). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, before refund, of cash paid to foreign, federal, state, and local jurisdictions as income tax. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The increase (decrease) during the reporting period in the amounts payable to vendors for goods and services received and the amount of obligations and expenses incurred but not paid. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The increase (decrease) during the reporting period in the aggregate amount of obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The increase (decrease) during the reporting period in the amounts payable to taxing authorities for taxes that are based on the reporting entity's earnings, net of amounts receivable from taxing authorities for refunds of overpayments or recoveries of income taxes, and in deferred and other tax liabilities and assets. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of increase (decrease) in operating assets classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of the cost of borrowed funds accounted for as interest expense for debt. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of cash inflow (outflow) from financing activity, including, but not limited to, discontinued operation. Financing activity includes, but is not limited to, obtaining resource from owner and providing return on, and return of, their investment; borrowing money and repaying amount borrowed, or settling obligation; and obtaining and paying for other resource obtained from creditor on long-term credit. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of cash inflow (outflow) from investing activity, including, but not limited to, discontinued operation. Investing activity includes, but is not limited to, making and collecting loan, acquiring and disposing of debt and equity instruments, property, plant, and equipment, and other productive assets. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of cash inflow (outflow) from operating activity, including, but not limited to, discontinued operation. Operating activity includes, but is not limited to, transaction, adjustment, and change in value not defined as investing or financing activity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of cash inflow (outflow) from operating activity, classified as other, in reconciling net income to reflect cash provided by (used in) operating activity when indirect cash flow method is applied. No definition available.
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- Definition The cash outflow for cost incurred directly with the issuance of an equity security. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The cash outflow associated with the acquisition of or advances to an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, and joint venture or equity method investment) or the acquisition of an additional interest in a subsidiary (controlled entity). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The cash outflow associated with the purchase of all investments (debt, security, other) during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Cash received for dividends and interest on the entity's equity and debt investments during the current period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period. No definition available.
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- Definition Amount of noncash expense for share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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