Redeemable Preferred Stock - Dividends, Liquidations and Conversion Rights (Details) - USD ($)			1 Months Ended	3 Months Ended	12 Months Ended
	Aug. 15, 2019	May 15, 2019	Mar. 31, 2005	Jan. 31, 2020	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Class Of Stock [Line Items]
Dividends declared					$ 3,200,000	$ 3,331,000	$ 3,231,000
Series B Preferred Stock
Class Of Stock [Line Items]
Preferred stock, dividends per share, declared					$ 50.00
Dividends, preferred stock, cash				$ 2,400,000	$ 3,200,000	4,800,000	1,600,000
Cumulative unpaid dividends					800,000	800,000
Dividends declared	$ 0	$ 0			$ 3,200,000	3,331,000	$ 3,231,000
Dividends payment date	Aug. 15, 2019	May 15, 2019
Aggregate amount of dividend payment	$ 1,600,000	$ 1,600,000
Preferred stock, dividend rate, percentage	5.00%	5.00%	5.00%
Preferred stock failed to pay dividend payments multiplier percentage	0.0625%	0.0625%
Preferred stock, liquidation preference per share					$ 1,000.00
Payment on junior shares					$ 0
Preferred Stock, Liquidation Preference, Value					$ 64,020,000	$ 64,020,000
Shares of common stock issued upon conversion					0.591
Stock conversion price					$ 1,692.00
Percent of conversion price to exceed to exercise conversion right					150.00%
Number of trading days					20 days
Number of consecutive trading days					30 days