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Note 2 - Stock Incentive Plans and Other Share-based Compensation (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Apr. 30, 2016
Apr. 30, 2015
Apr. 30, 2016
Apr. 30, 2015
Non-employee Directors [Member]        
Allocated Share-based Compensation Expense     $ 201,070  
Director [Member]        
Allocated Share-based Compensation Expense $ 201,070      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 86,296      
Restricted Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     86,296  
Allocated Share-based Compensation Expense $ 295,264 $ 387,200 $ 514,337 $ 637,694
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 301,000   301,000  
Restricted Stock, Shares Issued Net of Shares for Tax Withholdings     26,334  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition     2 years 328 days  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized $ 2,500,000   $ 2,500,000