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Product Warranties (Narrative) (Details) (USD $)
12 Months Ended
Oct. 31, 2012
Oct. 31, 2011
Oct. 31, 2010
Product Warranties [Abstract]      
Accrual for estimated product warranty claims $ 250,000 $ 175,000 $ 170,000
Warranty claims expense $ 348,947 $ 222,150 $ 273,682