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Nature of Business, Basis of Presentation and Significant Accounting Policies - Percent of Customer Consolidated Revenues (Details) - Sales Revenue Net Member - Customer Concentration Risk Member | 12 Months Ended
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Oct. 31, 2023 | Oct. 31, 2022 | Oct. 31, 2021
Korea Southern Power Company [Member] |  |  |
Nature Of Business And Basis Of Presentation [Line Items] |  |  |
Significant customer revenue percentage | 31.00% | 6.00% | 12.00%
Korea Fuel Cell Co. Limited [Member] |  |  |
Nature Of Business And Basis Of Presentation [Line Items] |  |  |
Significant customer revenue percentage | 16.00% | 46.00% |
Connecticut Light And Power. [Member] |  |  |
Nature Of Business And Basis Of Presentation [Line Items] |  |  |
Significant customer revenue percentage | 13.00% | 14.00% | 20.00%
ExxonMobil Technology and Engineering Company [Member] |  |  |
Nature Of Business And Basis Of Presentation [Line Items] |  |  |
Significant customer revenue percentage | 8.00% | 8.00% | 29.00%
Top Customers [Member] |  |  |
Nature Of Business And Basis Of Presentation [Line Items] |  |  |
Significant customer revenue percentage | 68.00% | 74.00% | 61.00%

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