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Note 5 - Product Warranties - Changes in Accrual for Product Warranties (Details) - USD ($)
3 Months Ended
Jan. 31, 2025
Jan. 31, 2024
Balance at beginning of period $ 65,000 $ 80,000
Liabilities accrued for warranties issued during the period 59,413 49,848
Warranty claims and costs paid during the period (9,627) (17,764)
Changes in liability for pre-existing warranties during the period (49,786) (37,084)
Balance at end of period $ 65,000 $ 75,000