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Note 3 - Allowance for Doubtful Accounts for Trade Accounts Receivable (Tables)
6 Months Ended
Apr. 30, 2016
Notes Tables  
Summary of Changes in the Allowance for Doubtful Accounts for Trade Accounts Receivable [Table Text Block]
 
 
Six Months Ended
 
 
 
April 30,
 
 
 
2016
 
 
2015
 
Balance at beginning of period
  $ 63,011     $ 92,988  
Bad debt expense (recovery)
    12,019       (17,264 )
Losses charged to allowance
    -       (6,820 )
Balance at end of period
  $ 75,030     $ 68,904