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Segment Disclosure (Narrative) (Details)
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12 Months Ended | ||
|---|---|---|---|
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Oct. 31, 2011
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Oct. 31, 2010
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Oct. 31, 2009
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| Segment Disclosure [Abstract] | |||
| Number of reportable operating segments | 1 | 1 | 1 |
| Number of major customers | 1 | 1 | 1 |
| Percentage of revenues contributed by major customers | 10.60% | 10.90% | 10.80% |