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Income Taxes (Details) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended
	Apr. 22, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax Examination [Line Items]
Reported tax rate		40.00%	16.50%	30.20%	(109.80%)
Proceeds from bank	$ 2,400

X

- Definition

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

+ References

No definition available.

+ Details

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Namespace Prefix:	gne_
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Balance Type:	na
Period Type:	duration

X

- 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

X

- Definition

The cash inflow from bank borrowing during the year.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration