XML 64 R53.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Acquisition of Smile Energy G.K. (Details) - USD ($) $ / shares in Units, $ in Millions |  | 9 Months Ended
--- | --- | ---
Jun. 07, 2018 | Sep. 30, 2018
Acquisition of Smile Energy G.K. (Textual) |  |
Exercisable acquisition date | Jun. 07, 2020 |
Amortized straight-line basis over estimated life |  | 10 years
Flower Power Service Agreement [Member] |  |
Acquisition of Smile Energy G.K. (Textual) |  |
Power service agreement fees |  | $ 0.4
Power service agreement initial term |  | 3 years
Charging set-up fees to expense on a straight-line basis |  | 3 years
Capital Sixty [Member] |  |
Acquisition of Smile Energy G.K. (Textual) |  |
Aggregate purchase price | $ 0.7 |
Purchase membership percentage | 5.00% |
Exercise price | $ 1 |
Genie Japan [Member] |  |
Acquisition of Smile Energy G.K. (Textual) |  |
Ownership interest percentage | 100.00% |
Option value | $ 0.3 |

X
- Definition Acquired agreement fees useful life. + References No definition available. + Details
Name: | gne_AcquiredAgreementFeesUsefulLife
Namespace Prefix: | gne_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Business combination consideration transferred other option cancellation payment amount. + References No definition available. + Details
Name: | gne_BusinessCombinationConsiderationTransferredOtherOptionCancellationPaymentAmount
Namespace Prefix: | gne_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Date when the business acquisition agreement was exercisable, in CCYY-MM-DD format. + References No definition available. + Details
Name: | gne_BusinessCombinationConsiderationTransferredOtherOptionExercisableDate
Namespace Prefix: | gne_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Business combination consideration transferred other option exercise price. + References No definition available. + Details
Name: | gne_BusinessCombinationConsiderationTransferredOtherOptionExercisePrice
Namespace Prefix: | gne_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Business combination consideration transferred other option membership interest percentage. + References No definition available. + Details
Name: | gne_BusinessCombinationConsiderationTransferredOtherOptionMembershipInterestPercentage
Namespace Prefix: | gne_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Term of agreement. + References No definition available. + Details
Name: | gne_TermOfAgreement
Namespace Prefix: | gne_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
Name: | us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
Name: | us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition Amount of asset related to consideration paid in advance for other costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6787-107765 + Details
Name: | us-gaap_OtherPrepaidExpenseCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | gne_TypeOfAgreementAxis=gne_FlowerPowerServiceAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=gne_CapitalSixtyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=gne_GenieJapanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |