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Note 2 - Allowance for Credit Losses for Trade Accounts Receivable (Tables)
12 Months Ended
Oct. 31, 2023
Notes Tables  
Summary of Changes in the Allowance for Doubtful Accounts for Trade Accounts Receivable [Table Text Block]
   

Years ended October 31,

 
   

2023

   

2022

   

2021

 

Balance at beginning of year

  $ 69,643     $ 61,527     $ 524,617  

Bad debt expense

    1,546       8,116       10,750  

Losses charged to allowance

                (473,840 )

Balance at end of year

  $ 71,189     $ 69,643     $ 61,527