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Product Warranties (Tables)
6 Months Ended
Apr. 30, 2013
Product Warranties [Abstract]  
Schedule Of Changes In Accrual For Product Warranties
    Six Months Ended  
    April 30,  
    2013     2012  
 
Balance at beginning of period $ 250,000   $ 175,000  
Liabilities accrued for warranties issued during the period   241,455     103,835  
Warranty claims and costs paid during the period   (131,640 )   (59,516 )
Changes in liability for pre-existing warranties during the period   (159,815 )   (69,319 )
Balance at end of period $ 200,000   $ 150,000