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Note 5 - Product Warranties (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Apr. 30, 2024
Apr. 30, 2023
Apr. 30, 2024
Apr. 30, 2023
Oct. 31, 2023
Oct. 31, 2022
Standard and Extended Product Warranty Accrual $ 75,000 $ 65,000 $ 75,000 $ 65,000 $ 80,000 $ 75,000
Product Warranty Expense 39,078 $ 13,078 44,266 $ 29,652    
Accounts Payable and Accrued Liabilities [Member]            
Standard and Extended Product Warranty Accrual $ 75,000   $ 75,000   $ 80,000