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Note 2 - Stock Compensation (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Apr. 30, 2022
Apr. 30, 2021
Apr. 30, 2022
Apr. 30, 2021
Share-Based Payment Arrangement, Expense $ 1,800 $ 900 $ 3,400 $ 1,800
Share-Based Payment Arrangement, Expense, after Tax 1,400   2,500  
Share-Based Payment Arrangement, Option [Member]        
Share-Based Payment Arrangement, Expense $ 45 $ 100 $ 90 $ 100