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Note 2 - Stock Incentive Plans and Other Share-based Compensation (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Jul. 31, 2023
Jul. 31, 2022
Jul. 31, 2023
Jul. 31, 2022
Restricted Stock [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period     28,560  
Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation     28,073  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)     1 year 4 months 24 days  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount $ 664,000   $ 664,000  
Plan 2017 [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant 356,000   356,000  
Plan 2017 [Member] | Restricted Stock [Member] | Share-Based Payment Arrangement, Nonemployee [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period 28,560      
Plan 2017 [Member] | Employees, Consultant and Non-employee Directors [Member]        
Share-Based Payment Arrangement, Expense $ 173,500 $ 87,173 $ 463,181 $ 324,824