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Note 5 - Product Warranties (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Jul. 31, 2024
Jul. 31, 2023
Jul. 31, 2024
Jul. 31, 2023
Oct. 31, 2023
Oct. 31, 2022
Standard and Extended Product Warranty Accrual $ 75,000 $ 80,000 $ 75,000 $ 80,000 $ 80,000 $ 75,000
Product Warranty Expense 9,153 $ 26,048 53,419 $ 55,700    
Accounts Payable and Accrued Liabilities [Member]            
Standard and Extended Product Warranty Accrual $ 75,000   $ 75,000   $ 80,000