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Note 5 - Product Warranties (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Jul. 31, 2025
Jul. 31, 2024
Jul. 31, 2025
Jul. 31, 2024
Oct. 31, 2024
Oct. 31, 2023
Standard and Extended Product Warranty Accrual $ 105,000 $ 75,000 $ 105,000 $ 75,000 $ 65,000 $ 80,000
Product Warranty Expense 53,088 $ 9,153 85,029 $ 60,994    
Accounts Payable and Accrued Liabilities [Member]            
Standard and Extended Product Warranty Accrual $ 105,000   $ 105,000   $ 65,000