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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 |  |  |  |  |

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