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Note 5 - Product Warranties (Tables)
3 Months Ended
Jan. 31, 2022
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
  

Three Months Ended

 
  

January 31,

 
  

2022

  

2021

 

Balance at beginning of period

 $75,000  $85,000 

Liabilities accrued for warranties issued during the period

  55,243   50,251 

Warranty claims and costs paid during the period

  (7,894)  (18,348)

Changes in liability for pre-existing warranties during the period

  (47,349)  (31,903)

Balance at end of period

 $75,000  $85,000