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Nature of Business, Basis of Presentation and Significant Accounting Policies (Tables) | 12 Months Ended
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Oct. 31, 2023
Nature of Business and Basis of Presentation |
Schedule of percent of consolidated revenues | The percent of consolidated revenues from our top customers for the years ended October 31, 2023, 2022 and 2021, respectively, are presented below. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2023 |  | 2022 |  | 2021 |
Korea Southern Power Company (KOSPO) |  | 31 | % | 6 | % | 12 | %
Korea Fuel Cell Co., Ltd (KFC) | ​ | 16 | % | 46 | % | — | %
Connecticut Light and Power |  | 13 | % | 14 | % | 20 | %
ExxonMobil Technology and Engineering Company (f/k/a ExxonMobil Research and Engineering Company) (EMTEC) |  | 8 | % | 8 | % | 29 | %
Total |  | 68 | % | 74 | % | 61 | %

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