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Convertible debentures, Embedded Derivative Liabilities (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2025 | Oct. 31, 2024 | Jul. 31, 2025 | Jul. 31, 2024
Embedded Derivative Liabilities [Abstract] |  |  |  |
Balance beginning period | $ 72,500 |  |  |
Change in fair value of derivative liabilities | 1,500 | $ 1,348,350 |  |
Balance end period | 74,000 |  | $ 72,500 |
Related Party [Member] | Envviron SAS [Member] |  |  |  |
Embedded Derivative Liabilities [Abstract] |  |  |  |
Balance beginning period | 72,500 | $ 919,250 | 919,250 |
Derivative liability component |  |  | 138,250 |
Change in fair value of derivative liabilities | 1,500 |  | (719,000) |
Transferred to equity |  |  | (266,000) |
Balance end period | $ 74,000 |  | 72,500 | $ 919,250
Transaction costs |  |  | 85,000 |
Related Party [Member] | Envviron SAS [Member] | General and Administrative Expenses [Member] |  |  |  |
Embedded Derivative Liabilities [Abstract] |  |  |  |
Transaction costs |  |  |  | 40,227
Host financial liability |  |  |  | 36,484
Embedded derivative |  |  |  | $ 3,743
Related Party [Member] | Envviron SAS [Member] | Convertible Debentures [Member] |  |  |  |
Embedded Derivative Liabilities [Abstract] |  |  |  |
Transaction costs |  |  | $ 85,000 |

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