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Prepaid Project Costs and Other Long-term Assets (Details Narrative) - USD ($) $ in Millions | Sep. 30, 2025 | May 31, 2025 | Dec. 31, 2024 | Dec. 31, 2022
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Battelle Energy Alliance, LLC (BEA) [Member] |  |  |  |
Prepaid project costs |  |  |  | $ 0.4
Prepaid Expenses And Other Current Assets [Member] |  |  |  |
Prepaid project costs | $ 0.3 |  | $ 0.5 |
Prepaid Expenses And Other Current Assets [Member] | Maximum [Member] |  |  |  |
Prepaid project costs |  | $ 0.5 |  |
Prepaid Expenses And Other Current Assets [Member] | Minimum [Member] |  |  |  |
Prepaid project costs |  | $ 0.1 |  |

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