XML 65 R54.htm IDEA: XBRL DOCUMENT v3.20.2

Acquisition (Details Textual) - USD ($)		1 Months Ended		3 Months Ended		6 Months Ended
	Jan. 02, 2019	Jan. 31, 2020	Nov. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Acquisitions (Textual)
Recorded revenue				$ 3,300,000
Description of acquired entity			the Company acquired an additional 9.0% interest in Lumo for $0.2 million, increasing its aggregate ownership to 89.0%. In January 2020, Lumo paid off half of the secured loan to GREI in exchange for additional shares which resulted in GREI's interest in Lumo increasing to 92.5%.
Lumo Energia Oyj [Member]
Acquisitions (Textual)
Aggregate cash payment	$ 1,869,000
Percentage of acquire controlling interest		7.50%
Total consideration, net of cash acquired	3,391,000
Recorded revenue					$ 2,800	$ 8,200	$ 7,600
Short-term debts	$ 2,260,000
Acquisition of purchase agreement	The Company completed the purchase of an 80% controlling interest in Lumo Energia Oyj ("Lumo"), a Finnish public limited company. The Company paid the sellers a total of €1.6 million (equivalent to $1.9 million). The Company contributed €1.3 million (equivalent to $1.5 million) as a capital loan to fund Lumo's working capital requirements. The Company also provided Lumo with a secured loan for €2.0 million (equivalent to $2.3 million) to pay off and replace its remaining debt. The secured loan is payable in 4 years and bears interest at annual rate of 4.0%, payable monthly. The Company also issued 176,104 shares of its Class B common stock to certain of the sellers which are subject to restrictions as described in the agreement (the “ Lumo Restricted Shares”). The Lumo Restricted Shares are subject to vesting conditions related to employment and services to be provided by the recipients of up to three years. The Lumo Restricted Shares are accounted for as a share-based compensation and is amortized to the consolidated statement of income over the vesting period of three years
Lumo Energia Oyj [Member] | Three Annual Installment [Member]
Acquisitions (Textual)
Vesting interest rate		33.30%
Trademark [Member] | Lumo Energia Oyj [Member]
Acquisitions (Textual)
Finite-Lived Intangible Asset, Useful Life	5 years
Non Compete Agreements [Member] | Lumo Energia Oyj [Member]
Acquisitions (Textual)
Finite-Lived Intangible Asset, Useful Life	3 years
Customer Relationships [Member] | Lumo Energia Oyj [Member]
Acquisitions (Textual)
Finite-Lived Intangible Asset, Useful Life	2 years

X

- References

No definition available.

+ Details

Name:	gne_AcquisitionOfPurchaseAgreements
Namespace Prefix:	gne_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	gne_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesShortTermDebt
Namespace Prefix:	gne_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	gne_DescriptionOfBusinessAndSummaryOfSignificantsAccountingPoliciesTextualAbstract
Namespace Prefix:	gne_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	gne_PercentageOfAcquireControllingInterest
Namespace Prefix:	gne_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

With respect to a business combination completed during the period, this element provides a description of the business, other than the name, which may include the industry, size, products and other important information.

+ 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 (a)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

+ Details

Name:	us-gaap_BusinessAcquisitionDescriptionOfAcquiredEntity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(3)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

+ Details

Name:	us-gaap_BusinessAcquisitionsProFormaRevenue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6613-128477

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6578-128477

+ Details

Name:	us-gaap_BusinessCombinationConsiderationTransferred1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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=120321790&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=121586364&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Percentage of vesting of award under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=gne_LumoEnergiaOyjMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	gne_InstallmentsAxis=gne_ThreeAnnualInstallmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TradeNamesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=gne_NonCompeteAgreementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: