Accrued Liabilities - Schedule of Accrued Liabilities (Parenthetical) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021	Oct. 31, 2021
Schedule Of Accrued Liabilities [Line Items]
Product warranty accrual, payment and adjustments	$ 200	$ 7	$ 400	$ 19
Loss reserve on service agreements	6,400		6,400		$ 6,500
Bridgeport Fuel Cell Project
Schedule Of Accrued Liabilities [Line Items]
Reserve for performance guarantees	$ 3,600		$ 3,600		$ 2,500