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Note 5 - Product Warranties (Tables)
3 Months Ended
Jan. 31, 2023
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
   

Three Months Ended

 
   

January 31,

 
   

2023

   

2022

 

Balance at beginning of period

  $ 75,000     $ 75,000  

Liabilities accrued for warranties issued during the period

    55,430       55,243  

Warranty claims and costs paid during the period

    (26,574 )     (7,894 )

Changes in liability for pre-existing warranties during the period

    (38,856 )     (47,349 )

Balance at end of period

  $ 65,000     $ 75,000