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CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - $ / shares
6 Months Ended 12 Months Ended
Apr. 30, 2019
Oct. 31, 2018
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) 17,772,753 17,647,135
Common Stock, outstanding (in shares) 17,772,753 17,647,135
Series B Convertible Preferred Stock [Member]    
Preferred stock, par value (in dollars per share) $ 100 $ 100
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
Coupon rate 8.75% 8.75%
Series B-2 Convertible Preferred Stock [Member]    
Preferred stock, par value (in dollars per share) $ 100 $ 100
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 [Member]    
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