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Note 2 - Stock Compensation (Details Textual) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jul. 31, 2018 | Jul. 31, 2017 | Jul. 31, 2018 | Jul. 31, 2017
Allocated Share-based Compensation Expense, Total | $ 0.6 | $ 0.1 | $ 2.7 | $ 1.6
Employee Stock Option [Member] |  |  |  |
Allocated Share-based Compensation Expense, Total | $ 0.9 | $ 0.2 | $ 1.1 | $ 0.4

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