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Note 14 - Preferred Stock (Details Textual) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended
Jul. 12, 2005
Apr. 30, 2024
Apr. 30, 2023
Apr. 30, 2024
Apr. 30, 2023
Oct. 31, 2023
Class of Stock [Line Items]            
Preferred Stock, Shares Issued, Total (in shares)   5,600   5,600   5,600
Payments of Dividends   $ 2.7 $ 2.7 $ 5.3 $ 5.3  
Preferred Class A [Member]            
Class of Stock [Line Items]            
Preferred Stock, Shares Issued, Total (in shares) 5,600          
Preferred Stock, Dividend Rate, Percentage 7.625%          
Preferred Stock, Liquidation Preference Per Share (in dollars per share) $ 25,000          
Preferred Stock, Depositary Shares, Number of Shares of Preferred Stock in Each Depositary Share (in shares) 0.001