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Note 6 - Product Warranties (Details Textual) - USD ($)
12 Months Ended
Oct. 31, 2022
Oct. 31, 2021
Oct. 31, 2020
Standard and Extended Product Warranty Accrual, Ending Balance $ 75,000 $ 75,000 $ 85,000
Product Warranty Expense 52,465 55,592 $ 67,150
Accounts Payable and Accrued Liabilities [Member]      
Standard and Extended Product Warranty Accrual, Ending Balance $ 75,000 $ 75,000