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Summary of significant accounting policies (Policies) | 6 Months Ended
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May 31, 2026
Summary of significant accounting policies |
Investment in Ambler Metals LLC | Investment in Ambler Metals LLC The Company accounts for its investment in Ambler Metals as an investment in associate. For a variable interest entity (“VIE”) where Trilogy is not the primary beneficiary, we use the equity method of accounting. Management assesses the possibility of impairment in the carrying value of its equity method investment in Ambler Metals whenever events or circumstances indicate that the carrying amount of the investment may not be recoverable. Ambler Metals is a non-publicly traded equity investment owning exploration and development projects. Significant judgments are made in assessing the possibility of impairment. The Company assesses whether there has been a potential triggering event for other-than-temporary impairment by assessing the underlying assets of Ambler Metals for recoverability and assessing whether there has been a change in the development plan or strategy for the projects. If the Company concludes there is sufficient evidence of an other-than-temporary impairment, an assessment of fair value is performed. If the underlying assets are not recoverable, the Company will record an impairment charge equal to the difference between the carrying amount of the equity investment and its fair value. This assessment is subjective and requires consideration at each period end.
Fair value measurement of derivative liability | Fair value measurement of derivative liability On October 6, 2025, the Company entered into a binding letter of intent with the U.S. Department of War for their conditional investment of approximately $17.8 million in exchange for 8,215,570 units at a price of $2.17 per unit, with each unit comprising one common share of the Company and ¾ of a 10-year warrant. Each full warrant is exercisable to acquire one common share of the Company at a price of $0.01 per share. The Company has accounted for the obligation to issue shares and warrants as a derivative financial instrument under ASC 815-40 and initially measured at fair value. Subsequently, at each period end, the derivative liability is re-measured at fair value with changes recorded in the consolidated statement of loss and comprehensive loss.
Stock-based payments | Stock-based payments The Company records share-based compensation awards exchanged for employee, director and certain contractor services at fair value on the date of the grant and expenses the awards over the requisite service period. The fair values of stock options are determined at the time of the grant using a Black-Scholes option pricing model, which takes into account, as of the grant date, the fair market value of the shares, expected volatility, expected dividend yield, the risk-free interest rate, and the expected life of the option. The Company’s estimates may be impacted by certain variables including, but not limited to, stock price volatility, employee stock option exercise behaviors, additional stock option grants, and estimates of forfeitures.
New accounting pronouncements | New accounting pronouncements Issued and Not Effective In December 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-09 “Income Taxes (Topic 740): Improvements to Income Tax Disclosures” (“ASU 2023-09”). ASU 2023-09 enhances the transparency and decision usefulness of income tax disclosures through changes to the rate reconciliation and income taxes paid information. The standard is effective beginning with the Company’s Annual Report on Form 10-K for the fiscal year ended November 30, 2026, and subsequent interim periods, with early adoption permitted. The Company is evaluating the impact of ASU 2023-09 on its disclosures in the annual consolidated financial statements. In December 2025, the FASB issued ASU 2025-11 “Interim Reporting (Topic 270): Narrow Scope Improvements” (“ASU 2025-11”), to improve the guidance for interim reporting and clarify when that guidance is applicable. ASU 2025-11 provides a comprehensive list of required disclosures and also requires entities to disclose events since the last annual reporting period that have a material impact on the entity. ASU 2025-11 is effective for interim reporting periods within annual reporting periods beginning after December 15, 2027. For the Company, the guidance becomes effective in the first interim reporting period of the fiscal period of the fiscal year ended November 30, 2029. Early adoption is permitted. Management is currently evaluating ASU 2025-11 to determine its impact on the Company’s disclosures.

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- Definition Disclosure of accounting policy for equity method of accounting for investments and other interests. Investment includes, but is not limited to, unconsolidated subsidiary, corporate joint venture, noncontrolling interest in real estate venture, limited partnership, and limited liability company. Information includes, but is not limited to, ownership percentage, reason equity method is or is not considered appropriate, and accounting policy election for distribution received. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-28 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481687/323-10-50-3 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 21D -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-21D + Details
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