Revenue Recognition - Additional Information (Details)			1 Months Ended	3 Months Ended	12 Months Ended
	Dec. 20, 2021 USD ($) item	Oct. 29, 2021 USD ($)	May 31, 2023 USD ($)	Apr. 30, 2022 USD ($)	Oct. 31, 2023 USD ($)	Oct. 31, 2022 USD ($) item	Oct. 31, 2021 USD ($)	Oct. 31, 2019 USD ($)	Aug. 25, 2023 USD ($)	Aug. 24, 2023 USD ($)	Jul. 31, 2023 item	Dec. 31, 2022 item	Dec. 19, 2022 USD ($)	Dec. 18, 2022 USD ($)	Apr. 29, 2022 USD ($)	Apr. 28, 2022 USD ($)
Disaggregation Of Revenue [Line Items]
Percentage of electricity output provided to customers					100.00%
Contract asset					$ 42,100,000	$ 20,700,000
Long-term					25,800,000	9,700,000
Contract liability					3,100,000	25,400,000
Consideration payable					6,300,000
Long term					6,000,000.0
Sale of investment tax credit					6,300,000
Transferred to accounts receivable					12,900,000	5,300,000
Revenues					123,394,000	130,484,000	$ 69,585,000
Research and development expenses					61,021,000	34,529,000	11,315,000
POSCO Energy Settlement Agreement
Disaggregation Of Revenue [Line Items]
Number of modules | item	2
Stand alone selling price per sale module	$ 3,000,000.0
Extended warranty term	7 years
Stand alone selling price per warranty module	$ 650,000
Settlement agreement variable consideration from contract with customer						$ 13,100,000
Number of additional modules expired without exercised | item												14
Option to purchase warranty module units | item						20
Settlement agreement number of module units sold | item	20					20
Option to purchase additional warranty module units | item	14
Modules units, order placed | item	20
Revenues					9,100,000
Emre joint development agreement
Disaggregation Of Revenue [Line Items]
Revenues			$ 2,500,000		300,000
Research costs reimbursement amount									$ 67,000,000.0	$ 60,000,000.0			$ 60,000,000.0	$ 50,000,000.0	$ 50,000,000.0	$ 45,000,000.0
Research and development expenses								$ 45,000,000.0
Milestone payment received						$ 5,000,000.0
Milestone based payments				$ 5,000,000.0
Investment Amount		$ 5,000,000.0
Emre joint development agreement | Rotterdam Project
Disaggregation Of Revenue [Line Items]
Investment amount						5,000,000.0
Remaining balance						2,500,000
Investment Amount						5,000,000.0
Product
Disaggregation Of Revenue [Line Items]
Revenues					19,589,000	60,000,000
Remaining performance obligations					0
Service and License
Disaggregation Of Revenue [Line Items]
Revenues					49,084,000	12,786,000	19,791,000
Remaining performance obligations					140,800,000
Generation
Disaggregation Of Revenue [Line Items]
Revenues					37,508,000	36,186,000	24,027,000
Remaining performance obligations					63,900,000
Advanced Technologies
Disaggregation Of Revenue [Line Items]
Revenues					17,213,000	$ 21,512,000	$ 25,767,000
Remaining performance obligations					15,300,000
KFC/Posco International Company (PE Group)
Disaggregation Of Revenue [Line Items]
Amount Recognized Under The Settlement Agreement					13,100,000
Revenues					$ 10,500,000
KFC/Posco International Company (PE Group) | LTSA | Noeul
Disaggregation Of Revenue [Line Items]
Number of modules transfer | item											16
Posco Energy | LTSA | Noeul
Disaggregation Of Revenue [Line Items]
Number of modules transfer | item											16