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Note 3 - Allowance for Credit Losses for Trade Accounts Receivable (Tables)
3 Months Ended
Apr. 30, 2024
Notes Tables  
Summary of Changes in the Allowance for Doubtful Accounts for Trade Accounts Receivable [Table Text Block]
   

Six Months Ended

 
   

April 30,

 
   

2024

   

2023

 

Balance at beginning of period

  $ 71,189     $ 69,643  

Bad debt expense (recovery)

    (16,928 )     14,959  

Balance at end of period

  $ 54,261     $ 84,602