Revenue Recognition - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2023 USD ($)	Jul. 31, 2022 USD ($)	Jul. 31, 2023 USD ($)	Jul. 31, 2022 USD ($)	Dec. 20, 2022 USD ($)	Dec. 19, 2022 USD ($)	Oct. 31, 2022 USD ($) item
Disaggregation Of Revenue [Line Items]
Percentage of electricity output provided to customers			100.00%
Contract asset	$ 46,100		$ 46,100				$ 20,700
Long-term	27,100		27,100				9,700
Contract liability	3,100		3,100				$ 25,400
Revenues	25,510	$ 43,104	100,932	$ 91,283
POSCO Energy Settlement Agreement
Disaggregation Of Revenue [Line Items]
Option to purchase additional warranty module units | item							14
Modules units, order placed | item							20
Revenues			9,100
Emre joint development agreement
Disaggregation Of Revenue [Line Items]
Revenues			2,500
Research costs reimbursement amount					$ 60,000	$ 50,000
Milestone payment received				5,000
Milestone based payments	200		200
Emre joint development agreement | Rotterdam Project
Disaggregation Of Revenue [Line Items]
Investment amount		5,000		5,000
Remaining balance		$ 2,500		$ 2,500
Service Agreements
Disaggregation Of Revenue [Line Items]
Remaining performance obligations	63,800		63,800
Advanced Technologies Contracts
Disaggregation Of Revenue [Line Items]
Remaining performance obligations	11,600		11,600
Groton Project
Disaggregation Of Revenue [Line Items]
Remaining performance obligations	$ 64,500		$ 64,500