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Note 11 - Income Taxes (Details Narrative) - USD ($) | Oct. 31, 2021 | Apr. 30, 2021
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Income Tax Disclosure [Abstract] |  |
Retained Earnings (Accumulated Deficit) | $ (20,108,301) | $ (15,809,928)
Deferred Tax Assets, Operating Loss Carryforwards | $ 804,000 | $ 632,000

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