Revenue Recognition - Additional Information (Details) $ in Thousands			3 Months Ended
	Dec. 20, 2021 USD ($) item	Oct. 29, 2021 USD ($)	Jan. 31, 2022 USD ($)	Jan. 31, 2021 USD ($)	Oct. 31, 2021 USD ($)
Disaggregation Of Revenue [Line Items]
Contract asset			$ 24,900		$ 20,500
Contract liability			34,500		$ 36,700
Research and development expenses			4,984	$ 1,823
Emre joint development agreement [Member]
Disaggregation Of Revenue [Line Items]
Milestone based payments			5,000
Investment Amount		$ 5,000	5,000
Discount on purchase of fuel cell module			5,000
POSCO Energy Settlement Agreement
Disaggregation Of Revenue [Line Items]
Deferred revenue	$ 22,200
Number of modules | item	2
Stand alone selling price per sale module	$ 3,000
Extended warranty term	7 years
Stand alone selling price per warranty module	$ 670
Option to purchase additional warranty module units | item	14
Modules units, order placed | item	20
Product
Disaggregation Of Revenue [Line Items]
Remaining performance obligations			60,200
Service Agreements [Member]
Disaggregation Of Revenue [Line Items]
Remaining performance obligations			123,700
Advanced Technologies Contracts [Member]
Disaggregation Of Revenue [Line Items]
Remaining performance obligations			31,700
Posco Energy
Disaggregation Of Revenue [Line Items]
Deferred revenue			$ 22,200