XML 20 R9.htm IDEA: XBRL DOCUMENT v3.5.0.2
Note 3 - Allowance for Doubtful Accounts for Trade Accounts Receivable
9 Months Ended
Jul. 31, 2016
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, 2016 and 2015 follows:
 
 
 
Nine Months Ended
 
 
 
July 31,
 
 
 
2016
 
 
2015
 
Balance at beginning of period
  $ 63,011     $ 92,988  
Bad debt expense (recovery)
    23,074       (14,203 )
Losses charged to allowance
    -       (6,820 )
Balance at end of period
  $ 86,085     $ 71,965