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Product Warranties (Tables)
12 Months Ended
Oct. 31, 2012
Product Warranties [Abstract]  
Schedule Of Changes In Accrual For Product Warranties
    Years ended October 31,  
    2012     2011  
 
Balance at beginning of year $ 175,000   $ 170,000  
Liabilities accrued for warranties issued during the year   411,381     257,550  
Warranty claims paid during the period   (273,947 )   (217,150 )
Changes in liability for pre-existing warranties during            
the year   (62,434 )   (35,400 )
Balance at end of year $ 250,000   $ 175,000