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Note 5 - Product Warranties - Changes in Accrual for Product Warranties (Details) - USD ($)
9 Months Ended
Jul. 31, 2023
Jul. 31, 2022
Balance at beginning of period $ 75,000 $ 75,000
Liabilities accrued for warranties issued during the period 77,089 98,392
Warranty claims and costs paid during the period (50,700) (47,606)
Changes in liability for pre-existing warranties during the period (21,389) (50,786)
Balance at end of period $ 80,000 $ 75,000