XML 49 R21.htm IDEA: XBRL DOCUMENT v2.4.0.6
Allowance For Doubtful Accounts For Trade Accounts Receivable (Tables)
9 Months Ended
Jul. 31, 2012
Allowance For Doubtful Accounts For Trade Accounts Receivable [Abstract]  
Summary Of Changes In The Allowance For Doubtful Accounts For Trade Accounts Receivable
    Nine Months Ended  
    July 31,  
    2012     2011  
 
Balance at beginning of period $ 145,616   $ 120,450  
Bad debt expense (recovery)   (8,958 )   21,831  
Losses charged to allowance   (34,577 )   (3,930 )
Balance at end of period $ 102,081   $ 138,351