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Note 3 – Marketable Securities (Details Narrative)	Apr. 30, 2023 USD ($)
Investments, Debt and Equity Securities [Abstract]
[custom:CorporateBondsAtCarryingValueFairValue-0]	$ 12,814,038
[custom:CorporateBondsAtCarryingValueCostBasis-0]	13,678,203
[custom:CorporateBondsAtCarryingValueUnrealizedLosses-0]	864,165
[custom:CorporateBondsAtCarryingValueContractualMaturities1-0]	2,138,088
[custom:CorporateBondsAtCarryingValueContractualMaturities2-0]	10,523,950
[custom:CorporateBondsAtCarryingValueContractualMaturities3-0]	$ 152,000