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Product Warranties (Tables)
9 Months Ended
Jul. 31, 2012
Product Warranties [Abstract]  
Schedule Of Changes In Accrual For Product Warranties
    Nine Months Ended  
    July 31,  
    2012     2011  
 
Balance at beginning of period $ 175,000   $ 170,000  
Liabilities accrued for warranties issued during the period   218,454     230,500  
Warranty claims and costs paid during the period   (140,592 )   (150,125 )
Changes in liability for pre-existing warranties during the period   (62,862 )   (60,375 )
Balance at end of period $ 190,000   $ 190,000