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Income taxes (Tables) | 12 Months Ended
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Nov. 30, 2023
Income taxes |
Schedule of differences in Canadian federal and provincial income tax rates to earnings before income taxes | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | in thousands of dollars | ​
​ | ​ | November 30, 2023 | ​ | ​ | November 30, 2022 | ​ | ​ | November 30, 2021 | ​
​ |  | $ |  |  | $ |  |  | $ |
Combined federal and provincial statutory tax rate | ​ | 27.00 | % | ​ | 27.00 | % | ​ | 27.00 | %
Income tax (recovery) at statutory rate | ​ | (4,037) | ​ | ​ | (6,549) | ​ | ​ | (5,848) | ​
Difference in foreign tax rates | ​ | (118) | ​ | ​ | (252) | ​ | ​ | (194) | ​
Non-deductible expenditures | ​ | 239 | ​ | ​ | 374 | ​ | ​ | 937 | ​
Change in estimates in respect of prior years | ​ | 15 | ​ | ​ | 39 | ​ | ​ | 116 | ​
Change in valuation allowance | ​ | 3,901 | ​ | ​ | 6,388 | ​ | ​ | 4,989 | ​
Income tax recovery (expense) | ​ | — | ​ | ​ | — | ​ | ​ | — | ​
Schedule of future income tax assets and liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | in thousands of dollars |
​ | ​ | November 30, 2023 | ​ | ​ | November 30, 2022 |
​ |  | $ |  |  | $ |
Deferred income tax assets | ​ |  |  | ​ |  | ​
Non-capital losses | ​ | 60,255 |  | ​ | 57,236 | ​
Mineral property interest | ​ | 4,926 |  | ​ | 3,061 | ​
Mineral property impairment | ​ | 26 | ​ | ​ | 17 | ​
Deferred interest | ​ | 6,251 |  | ​ | 6,251 | ​
Property, plant and equipment | ​ | 88 |  | ​ | 86 | ​
Lease liability | ​ | 9 | ​ | ​ | 60 | ​
Share issuance costs | ​ | (5) |  | ​ | 6 | ​
Other deductible temporary differences | ​ | 166 |  | ​ | 181 | ​
Total deferred tax assets | ​ | 71,716 |  | ​ | 66,898 | ​
Valuation allowance | ​ | (44,456) |  | ​ | (40,555) | ​
Net deferred income tax assets | ​ | 27,260 |  | ​ | 26,343 | ​
Deferred income tax liabilities | ​ |  |  | ​ |  | ​
Investment in Ambler Metals LLC | ​ | (27,229) | ​ | ​ | (26,257) | ​
Right of use asset | ​ | (31) | ​ | ​ | (86) | ​
Deferred income tax liabilities | ​ | (27,260) |  | ​ | (26,343) | ​
Net deferred income tax assets | ​ | — |  | ​ | — | ​
Schedule of loss carry forwards expiry | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | in thousands of dollars | ​
​ | ​ | Non-capital losses | ​ | ​ | Operating losses | ​
​ | ​ | Canada | ​ | ​ | United States | ​
​ |  | $ |  |  | $ |
2024 | ​ | — | ​ | ​ | 569 | ​
2025 | ​ | — | ​ | ​ | 1,530 | ​
2026 | ​ | — | ​ | ​ | 7,871 | ​
Thereafter | ​ | 63,192 | ​ | ​ | 140,858 | ​
​ | ​ | 63,192 | ​ | ​ | 150,828 | ​

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Paragraph 9 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-9 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-2 + Details
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