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v3.23.1

Consolidated Statements of Operations (Unaudited) (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Stock-based compensation included in selling, general and administrative expenses | $ 899 | $ 840

X
- Definition Amount of expense for award under share-based payment arrangement. Exclude amount capitalized. + References No definition available. + Details
Name: | gne_AllocatedShareBasedCompensationExpenses
Namespace Prefix: | gne_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration