Redeemable Preferred Stock - Class A Preferred Shares (Details) $ in Thousands			12 Months Ended
	Dec. 18, 2020 USD ($)	Dec. 18, 2020 CAD ($)	Oct. 31, 2021 USD ($)	Oct. 31, 2021 CAD ($)	Oct. 31, 2020 USD ($) shares	Oct. 31, 2020 CAD ($)	Oct. 31, 2019 USD ($)	Oct. 31, 2019 CAD ($)	Dec. 31, 2020 CAD ($)	Oct. 31, 2020 CAD ($) shares
Class Of Stock [Line Items]
Derivative liability, fair value, gross liability					$ 600
Loss on Series 1 preferred stock extinguishment	$ 900		$ (934)		$ 475
Payoff Letter [Member] | Enbridge Inc. [Member]
Class Of Stock [Line Items]
Accrued dividend									$ 23,100,000
Preferred Stock Redemption Amount									4,300,000
Carrying value of preferred shares, total									$ 27,400,000
Final payment to payoff	$ 21,500	$ 27,400,000
Class A Preferred Shares [Member]
Class Of Stock [Line Items]
Preferred Stock Shares Outstanding | shares					1,000,000					1,000,000
Preferred stock, shares issued | shares					1,000,000					1,000,000
Increase In Dividend Rate Annually			15.00%	15.00%
Dividend payment terms			annual	annual
Return of Capital Payments				$ 750,000
Aggregate amount of dividend payment				$ 500,000
Accrued and unpaid dividend obligation					$ 17,700					$ 23,400,000
Loss Resulted From Revised Fair Value Of Preferred Shares					200	$ 200,000
Accrued dividend					17,400					23,200,000
Preferred Stock Redemption Amount					$ 3,200					4,300,000
Class A Preferred Shares [Member] | Minimum [Member]
Class Of Stock [Line Items]
Preferred stock, redemption date			Dec. 31, 2020	Dec. 31, 2020
Class A Preferred Shares [Member] | Maximum [Member]
Class Of Stock [Line Items]
Preferred stock, redemption date			Dec. 31, 2021	Dec. 31, 2021
Series 1 Preferred Shares
Class Of Stock [Line Items]
Return of Capital Payments						750,000
Aggregate amount of dividend payment						$ 500,000
Preferred stock, dividend rate, percentage					1.25%	1.25%
Cumulative unpaid dividends					$ 12,500
Return of Capital and Dividend Payments					1,600	$ 1,900,000	$ 200	$ 300,000
Interest expense, other					2,900	$ 4,000,000.0	$ 2,300	$ 3,000,000.0
Carrying value of preferred shares, total					$ 19,200					$ 25,600,000