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Product Warranties (Tables)
3 Months Ended
Jan. 31, 2013
Product Warranties [Abstract]  
Schedule Of Changes In Accrual For Product Warranties
    Three Months Ended  
    January 31,  
    2013     2012  
 
Balance at beginning of period $ 250,000   $ 175,000  
Liabilities accrued for warranties issued during the period   139,834     68,719  
Warranty claims and costs paid during the period   (30,344 )   (34,732 )
Changes in liability for pre-existing warranties during the period   (149,490 )   (50,987 )
Balance at end of period $ 210,000   $ 158,000