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Note 6 - Product Warranties (Tables)
12 Months Ended
Oct. 31, 2023
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
   

Years ended October 31,

 
   

2023

   

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