| **Marketable Securities (Details) - USD ($) $ in Thousands**             | Jul. 31, 2016 | Oct. 31, 2015 |
|--------------------------------------------------------------------------|---------------|---------------|
| **Schedule of Trading Securities and Other Trading Assets [Line Items]** |          |          |
| Current trading securities (cost)                                        | $ 243         | $ 165         |
| Noncurrent trading securities (cost)                                     | 4,624         | 4,090         |
| Current trading securities (fair value)                                  | 276           | 236           |
| Noncurrent trading securities (fair value)                               | 5,136         | 4,666         |
| Total trading securities (cost)                                          | 4,867         | 4,255         |
| Total trading (fair value)                                               | 5,412         | 4,902         |
| Money markets                                                            |          |          |
| **Schedule of Trading Securities and Other Trading Assets [Line Items]** |          |          |
| Current trading securities (cost)                                        | 26            | 51            |
| Noncurrent trading securities (cost)                                     | 579           | 465           |
| Current trading securities (fair value)                                  | 26            | 51            |
| Noncurrent trading securities (fair value)                               | 579           | 465           |
| Mutual funds                                                             |          |          |
| **Schedule of Trading Securities and Other Trading Assets [Line Items]** |          |          |
| Current trading securities (cost)                                        | 217           | 114           |
| Noncurrent trading securities (cost)                                     | 4,045         | 3,625         |
| Current trading securities (fair value)                                  | 250           | 185           |
| Noncurrent trading securities (fair value)                               | $ 4,557       | $ 4,201       |

| X                                                                                                                                                                                                                                                                          |
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Marketable securities at cost, classified as current.
+ References
No definition available.
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Marketable securities at cost, classified as noncurrent.
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| - Definition
Total debt and equity financial instruments including: (1) securities held-to-maturity, (2) trading securities, and (3) securities available-for-sale.
+ References
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Amount of investments in debt and equity securities, including, but not limited to, held-to-maturity, trading and available-for-sale expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer.
+ References
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| - Definition
Total debt and equity financial instruments including: (1) securities held-to-maturity and (2) securities available-for-sale that will be held for the long-term.
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
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No definition available.
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Cost of investments in equity securities and other forms of securities that provide ownership interests classified as trading.
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No definition available.
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