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Allowance For Doubtful Accounts For Trade Accounts Receivable (Summary Of Changes In The Allowance For Doubtful Accounts For Trade Accounts Receivable) (Details) (USD $)
12 Months Ended
Oct. 31, 2012
Oct. 31, 2011
Oct. 31, 2010
Allowance For Doubtful Accounts For Trade Accounts Receivable [Abstract]      
Balance at beginning of year $ 145,616 $ 120,450 $ 108,913
Bad debt expense (recovery) (10,327) 40,231 29,798
Losses charged to allowance (43,141) (15,065) (18,261)
Balance at ending of year $ 92,148 $ 145,616 $ 120,450