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Note 14 - Preferred Stock (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jul. 12, 2005
Apr. 30, 2022
Apr. 30, 2021
Apr. 30, 2022
Apr. 30, 2021
Oct. 31, 2021
Preferred Stock, Shares Issued, Total (in shares)   5,600   5,600   5,600
Payments of Dividends, Total       $ 5,338 $ (0)  
Preferred Class A [Member]            
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          
Payments of Dividends, Total   $ 2,700 $ 0 $ 5,300 $ 0