Note 3 - Summary of Significant Accounting Policies - Property and Equipment (Details) - USD ($) |
Jul. 31, 2026 |
Apr. 30, 2026 |
|---|---|---|
| Property and equipment, gross | $ 604,461 | $ 604,461 |
| Less: Accumulated depreciation | (571,481) | (565,149) |
| Property and equipment, net | 32,980 | 39,312 |
| Equipment [Member] | ||
| Property and equipment, gross | 469,086 | 469,086 |
| Furniture and Fixtures [Member] | ||
| Property and equipment, gross | 102,563 | 102,563 |
| Leasehold Improvements [Member] | ||
| Property and equipment, gross | $ 32,812 | $ 32,812 |
| X | ||||||||||
- Definition Amount of accumulated depreciation, depletion, and amortization of property, plant, and equipment. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount, before accumulated depreciation, depletion, and amortization, of property, plant, and equipment. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount, after accumulated depreciation, depletion, and amortization, of property, plant, and equipment. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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