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Note 13 - Related-Party Transactions (Details Narrative) - USD ($) | 1 Months Ended | 2 Months Ended | 5 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jul. 31, 2021 | Oct. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2020 | Jul. 31, 2021
Related Party [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
[custom:ConvertibleNoteIssuedAccreditedInvestor] |  |  | $ 300,000 |  |
[custom:ConvertibleNoteIssuedDirector] |  |  | 125,000 |  |
[custom:ConvertibleNoteIssuedChiefExecutiveOfficer] |  |  | $ 25,000 |  |
Debt Instrument, Term |  |  | 2 years |  |
Debt Instrument, Interest Rate During Period |  |  | 12.00% |  |
[custom:ConvertibleNotesPrincipalConversion] |  | $ 450,000 |  |  |
[custom:ConvertibleNotesAccruedInterestConversion] |  | $ 45,204 |  |  |
[custom:ConvertibleNotesConversionShares] |  | 710,444 |  |  |
Aerocarve |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Proceeds from Other Debt |  |  |  | $ 79,000 |
[custom:AnnualInterestOnRelatedPartyAdvances] |  |  |  |  | 5.00%
Director 1 [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
[custom:ConsultingAgreementMonthlyPayments] | $ 6,000 |  |  |  |
[custom:OptionsToPurchaseCommonStockIssuedPursuantToConsultingAgreement] | 150,000 |  |  |  |
[custom:OptionsToPurchaseCommonStockIssuedPursuantToConsutlingAgreementPurchasePrice] | $ 2.51 |  |  |  |

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