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Note 2 - Stock Compensation (Details Textual) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Jan. 31, 2018 | Jan. 31, 2017
Allocated Share-based Compensation Expense, Net of Tax | $ 1.0 | $ 0.5
Employee Stock Option [Member] |  |
Allocated Share-based Compensation Expense, Net of Tax | $ 0.2 | $ 0.1

X
- Definition The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |