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CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - $ / shares
 9 Months Ended 12 Months Ended
Jul. 31, 2020
Oct. 31, 2019
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) 17,857,707 17,756,180
Common stock, outstanding (in shares) 17,815,607 17,756,180
Common stock in treasury (in shares) 42,100  
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
Preferred stock, shares outstanding (in shares)   14,790
Coupon rate 8.75% 8.75%
Series B-2 Convertible Preferred Stock    
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
Coupon rate 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