Note 3 - Summary of Significant Accounting Policies - Property and Equipment (Details) - USD ($) |
Jun. 30, 2026 |
Apr. 30, 2026 |
Dec. 31, 2025 |
Apr. 30, 2025 |
|---|---|---|---|---|
| Property and equipment, gross | $ 604,461 | $ 600,907 | ||
| Less: Accumulated depreciation | (565,149) | (537,358) | ||
| Property and equipment, net | $ 39,312 | 39,312 | $ 63,549 | 63,549 |
| Equipment [Member] | ||||
| Property and equipment, gross | 469,086 | 465,532 | ||
| 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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