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