XML 94 R83.htm IDEA: XBRL DOCUMENT
v3.20.2

Related Party Transactions (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
IDT [Member] |  |  |  |
Summary of related party transactions |  |  |  |
Amount IDT charged the Company | $ 249 | $ 255 | $ 520 | $ 438
Amount the Company charged IDT | 41 | 42 | 79 | 79
Rafael [Member] |  |  |  |
Summary of related party transactions |  |  |  |
Amount IDT charged the Company | $ 56 | $ 57 | $ 112 | $ 111

X
- Definition Reduction of selling, general and administrative expenses resulting from transactions with related party. + References No definition available. + Details
Name: | gne_RelatedPartyTransactionReductionOfSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty
Namespace Prefix: | gne_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionDueFromToRelatedPartyAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of selling, general and administrative expenses resulting from transactions, excluding transactions that are eliminated in consolidated or combined financial statements, with related party. + References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=gne_IdtCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=gne_RafaelHoldingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |