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Nature of Business, Basis of Presentation and Significant Accounting Policies (Tables) | 12 Months Ended
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Oct. 31, 2024
Nature of Business, Basis of Presentation and Significant Accounting Policies |
Schedule of percent of consolidated revenues | The percent of consolidated revenues from our top customers for the years ended October 31, 2024, 2023 and 2022, respectively, are presented below. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Years Ended October 31, |
​ |  | 2024 | 2023 | 2022
Connecticut Light and Power | ​ | 21 | % | 13 | % | 14 | %
Gyeonggi Green Energy Co., Ltd. (“GGE”) | ​ | 18 | % | — | % | — | %
Esso Nederland B.V. (“Esso”) |  | 10 | % | 2 | % | — | %
ExxonMobil Technology and Engineering Company (f/k/a ExxonMobil Research and Engineering Company) (EMTEC) |  | 8 | % | 8 | % | 8 | %
Ameresco/Sacramento Sewer |  | 7 | % | — | % | — | %
Korea Southern Power Company (KOSPO) | ​ | 1 | % | 31 | % | 6 | %
Korea Fuel Cell Co., Ltd (KFC) | ​ | — | % | 16 | % | 46 | %
Total |  | 65 | % | 70 | % | 74 | %

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