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Product Warranties (Schedule Of Changes In Accrual For Product Warranties) (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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| Product Warranties [Abstract] | ||
| Balance at beginning of year | $ 175,000 | $ 170,000 |
| Liabilities accrued for warranties issued during the year | 411,381 | 257,550 |
| Warranty claims and costs paid during the period | (273,947) | (217,150) |
| Changes in liability for pre-existing warranties during the year | (62,434) | (35,400) |
| Balance at end of year | $ 250,000 | $ 175,000 |