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v3.20.2

Basis of Presentation (Details) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2018 | Mar. 31, 2018 | Jun. 30, 2020 | Jun. 30, 2019
Basis of Presentation (Textual) |  |  |  |  |  |
Company's investment, ownership percentage in subsidiary |  |  |  |  | 86.10% |
Ownership interest of company |  |  |  |  | 77.00% |
Genie Retail Energy [Member] |  |  |  |  |  |
Basis of Presentation (Textual) |  |  |  |  |  |
Company's investment, ownership percentage in subsidiary |  |  |  |  | 100.00% |
Percentage of gas revenue generated in given period | 31.80% | 46.90% |  | 50.30% |  |
Percentage of electricity revenue generated in given period |  |  | 29.50% |  |  |
Genie Oil and Gas, Inc. [Member] |  |  |  |  |  |
Basis of Presentation (Textual) |  |  |  |  |  |
Company's investment, ownership percentage in subsidiary |  |  |  |  | 97.00% |
Genie Energy Services [Member] |  |  |  |  |  |
Basis of Presentation (Textual) |  |  |  |  |  |
Company's investment, ownership percentage in subsidiary |  |  |  |  | 100.00% |
Prism Solar Technology [Member] |  |  |  |  |  |
Basis of Presentation (Textual) |  |  |  |  |  |
Business Acquired interest |  |  |  |  | 60.00% |
Afek Oil and Gas, Ltd. [Member] |  |  |  |  |  |
Basis of Presentation (Textual) |  |  |  |  |  |
Company's investment, ownership percentage in subsidiary |  |  |  |  | 86.10% |
Lumo Energia Oyj [Member] |  |  |  |  |  |
Basis of Presentation (Textual) |  |  |  |  |  |
Company's investment, ownership percentage in subsidiary |  |  |  |  | 100.00% |
Business Acquired interest |  |  |  |  |  | 92.50%
GRE International Corporation [Member] |  |  |  |  |  |
Basis of Presentation (Textual) |  |  |  |  |  |
Company's investment, ownership percentage in subsidiary |  |  |  |  | 99.30% |
Genie Retail Energy International [Member] |  |  |  |  |  |
Basis of Presentation (Textual) |  |  |  |  |  |
Company's investment, ownership percentage in subsidiary |  |  |  |  | 100.00% |
Atid Drilling Ltd. [Member] |  |  |  |  |  |
Basis of Presentation (Textual) |  |  |  |  |  |
Company's investment, ownership percentage in subsidiary |  |  |  |  | 37.50% |

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