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Note 6 - Product Warranties (Tables)
12 Months Ended
Oct. 31, 2022
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
   

Years ended October 31,

 
   

2022

   

2021

 

Balance at beginning of year

  $ 75,000     $ 85,000  

Liabilities accrued for warranties issued during the year

    97,501       74,555  

Warranty claims paid during the period

    (52,465 )     (65,592 )

Changes in liability for pre-existing warranties during the year

    (45,036 )     (18,963 )

Balance at end of year

  $ 75,000     $ 75,000