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Note 6 - Product Warranties - Changes in Accrual for Product Warranties (Details) - USD ($)
12 Months Ended
Oct. 31, 2023
Oct. 31, 2022
Balance at beginning of year $ 75,000 $ 75,000
Liabilities accrued for warranties issued during the year 114,577 97,501
Warranty claims paid during the period (84,548) (52,465)
Changes in liability for pre-existing warranties during the year (25,029) (45,036)
Balance at end of year $ 80,000 $ 75,000