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CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - $ / shares
 6 Months Ended 12 Months Ended
Apr. 30, 2022
Oct. 31, 2021
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 39,000,000 39,000,000
Common stock, shares issued (in shares) 17,972,528 17,936,377
Common stock, shares outstanding (in shares) 17,721,551 17,685,400
Treasury stock (in shares) 250,977 250,977
Series B Convertible Preferred Stock    
Preferred stock, par value (in dollars per share) $ 100.00 $ 100.00
Preferred stock, shares authorized (in shares) 50,000 50,000
Preferred stock, shares issued (in shares) 14,790 14,790
Preferred stock, shares outstanding (in shares) 14,790 14,790
Preferred stock coupon rate (percentage) 8.75% 8.75%
Series B-2 Preferred    
Preferred stock, par value (in dollars per share) $ 100.00 $ 100.00
Preferred stock, shares authorized (in shares) 10,000 10,000
Preferred stock, shares issued (in shares) 9,300 9,300
Preferred stock, shares outstanding (in shares) 9,300 9,300
Preferred stock coupon rate (percentage) 4.00% 4.00%
Liquidation preference per share (in dollars per share) $ 1,000 $ 1,000
Series A Junior Participating Preferred Stock    
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (in shares) 20,000 20,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0