XML 70 R60.htm IDEA: XBRL DOCUMENT v3.23.1

Fair Value Measurements (Details 2)	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Sales Revenue, Net [Member] | Customer A [Member]
Concentration Risk [Line Items]
Concentration risk, percentage		10.40%
Consolidated gross trade accounts receivable [Member] | Customer A [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	10.90%		10.20%
Consolidated gross trade accounts receivable [Member] | Customer B [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	11.00%

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage values derived from the division.

+ References

No definition available.

+ Details

Name:	gne_ConcentrationRiskPercentage
Namespace Prefix:	gne_
Data Type:	num:percentItemType
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

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

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=gne_SalesRevenueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=gne_CustomerAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=gne_AccountsReceivableNetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=gne_CustomerBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: