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Note 2 - Stock Incentive Plans and Other Share-based Compensation (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
May 17, 2024
Apr. 30, 2024
Apr. 30, 2023
Apr. 30, 2024
Apr. 30, 2023
Restricted Stock [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period       842  
Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation       40,324  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition       1 year  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount   $ 262,000   $ 262,000  
Plan 2017 [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant   397,000   397,000  
Plan 2017 [Member] | Restricted Stock [Member] | Subsequent Event [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period 39,960        
Plan 2017 [Member] | Employees, Consultant and Non-employee Directors [Member]          
Share-Based Payment Arrangement, Expense   $ 91,641 $ 154,639 $ 250,792 $ 289,680