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Allowance For Doubtful Accounts For Trade Accounts Receivable
 3 Months Ended
Jan. 31, 2014
Receivables [Abstract]  
Allowance For Doubtful Accounts For Trade Accounts Receivable
Allowance for Doubtful Accounts for Trade Accounts Receivable
A summary of changes in the allowance for doubtful accounts for trade accounts receivable for the three months ended January 31, 2014 and 2013 follows: 
 
 
Three Months Ended
 
 
January 31,
 
 
2014
 
2013
Balance at beginning of period
 
$
74,073

 
$
92,148

Bad debt recovery
 
(7,255
)
 
(7,095
)
Losses charged to allowance
 
—

 
387

Balance at end of period
 
$
66,818

 
$
85,440