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Note 6 - Product Warranties - Changes in Accrual for Product Warranties (Details) - USD ($)
12 Months Ended
Oct. 31, 2025
Oct. 31, 2024
Balance at beginning of year $ 65,000 $ 80,000
Liabilities accrued for warranties issued during the year 140,157 83,000
Warranty claims paid during the period (69,935) (76,465)
Changes in liability for pre-existing warranties during the year (35,222) (21,535)
Balance at end of year $ 100,000 $ 65,000