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Segment Information (Details 2) (USD $) In Thousands, unless otherwise specified | Oct. 31, 2012 | Oct. 31, 2011
--- | --- | ---
Long-lived assets attributed to geographic areas |  |
Long-lived assets, Total | $ 50,562 | $ 47,091
UNITED STATES |  |
Long-lived assets attributed to geographic areas |  |
Long-lived assets attributed to United States | 29,893 | 30,494
MEXICO |  |
Long-lived assets attributed to geographic areas |  |
Long-lived assets attributed to Mexico | $ 20,669 | $ 16,597

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