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v3.23.1

Fair Value Measurements (Details 2) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022
Sales Revenue, Net [Member] | Customer A [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage |  | 10.40% |
Consolidated gross trade accounts receivable [Member] | Customer A [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 10.90% |  | 10.20%
Consolidated gross trade accounts receivable [Member] | Customer B [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 11.00% |  |

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage values derived from the division. + References No definition available. + Details
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Namespace Prefix: | gne_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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- Details
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