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Note 13 - Preferred Stock (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Jul. 12, 2005
Jan. 31, 2019
Jan. 31, 2018
Oct. 31, 2018
Preferred Stock, Shares Issued, Total   5,600   5,600
Preferred Class A [Member]        
Preferred Stock, Shares Issued, Total 5,600      
Preferred Stock, Dividend Rate, Percentage 7.625%      
Preferred Stock, Liquidation Preference Per Share $ 25,000      
Preferred Stock, Depositary Shares, Number of Shares of Preferred Stock in Each Depositary Share 0.001      
Payments of Dividends, Total   $ 0 $ 0