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Note 3 - Allowance for Doubtful Accounts for Trade Accounts Receivable (Tables)
9 Months Ended
Jul. 31, 2023
Notes Tables  
Summary of Changes in the Allowance for Doubtful Accounts for Trade Accounts Receivable [Table Text Block]
   

Nine Months Ended

 
   

July 31,

 
   

2023

   

2022

 

Balance at beginning of period

  $ 69,643     $ 61,527  

Bad debt expense

    7,767       38,063  

Balance at end of period

  $ 77,410     $ 99,590