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v3.23.1

Basis of Presentation and Business Changes and Development (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Sep. 30, 2022 | Sep. 30, 2021
Basis of Presentation and Business Changes and Development (Textual) |  |  |  |
Percentage of gas revenue generated in given period | 39.70% | 44.50% | 30.50% | 30.30%
Interest rate | 100.00% |  |  |
Other nonoperating income | $ 3.1 |  |  |
Genie Retail Energy [Member] |  |  |  |
Basis of Presentation and Business Changes and Development (Textual) |  |  |  |
Company's investment, ownership percentage in subsidiary | 100.00% |  |  |
Prism Solar Technology [Member] |  |  |  |
Basis of Presentation and Business Changes and Development (Textual) |  |  |  |
Business acquired interest | 60.00% |  |  |
GRE International Corporation [Member] |  |  |  |
Basis of Presentation and Business Changes and Development (Textual) |  |  |  |
Company's investment, ownership percentage in subsidiary | 99.50% |  |  |
Genie Retail Energy International [Member] |  |  |  |
Basis of Presentation and Business Changes and Development (Textual) |  |  |  |
Company's investment, ownership percentage in subsidiary | 100.00% |  |  |
CityCom Solar [Member] |  |  |  |
Basis of Presentation and Business Changes and Development (Textual) |  |  |  |
Company's investment, ownership percentage in subsidiary | 92.80% |  |  |
Genie Solar Energy [Member] |  |  |  |
Basis of Presentation and Business Changes and Development (Textual) |  |  |  |
Company's investment, ownership percentage in subsidiary | 95.50% |  |  |
Diversegy [Member] |  |  |  |
Basis of Presentation and Business Changes and Development (Textual) |  |  |  |
Company's investment, ownership percentage in subsidiary | 96.00% |  |  |

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