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Note 3 - Allowance for Doubtful Accounts for Trade Accounts Receivable
9 Months Ended
Jul. 31, 2022
Notes to Financial Statements  
Allowance for Doubtful Accounts for Trade Accounts Receivable Disclosure [Text Block]

(3)

Allowance for Doubtful Accounts for Trade Accounts Receivable

 

A summary of changes in the allowance for doubtful accounts for trade accounts receivable for the nine months ended July 31, 2022 and 2021 follows:

 

  

Nine Months Ended

 
  

July 31,

 
  

2022

  

2021

 

Balance at beginning of period

 $61,527  $524,617 

Bad debt expense

  38,063   10,828 

Balance at end of period

 $99,590  $535,445