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Note 2 - Stock Compensation (Details Textual) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jul. 31, 2017
Jul. 31, 2016
Jul. 31, 2017
Jul. 31, 2016
Allocated Share-based Compensation Expense, Net of Tax   $ 0.8   $ 1.5
Allocated Share-based Compensation Expense $ 0.1 1.0 $ 1.6 1.8
Employee Stock Option [Member]        
Allocated Share-based Compensation Expense $ 0.2 $ 0.3 $ 0.4 0.5
Share-based Compensation Income       1.6
Performance Shares [Member]        
Share-based Compensation, Reverse of Previously Recognized Expense       $ 2.1