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Product Warranties (Narrative) (Details) (USD $)
3 Months Ended 6 Months Ended
Apr. 30, 2013
Apr. 30, 2012
Apr. 30, 2013
Apr. 30, 2012
Oct. 31, 2012
Oct. 31, 2011
Product Warranties [Abstract]            
Accrual for estimated product warranty claims $ 200,000 $ 150,000 $ 200,000 $ 150,000 $ 250,000 $ 175,000
Warranty claims expense $ 91,296 $ 16,784 $ 81,640 $ 34,516