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Assets and Liabilities Held for Sale and Discontinued Operations - Additional Information (Details)	Dec. 31, 2022
Discontinued Operations and Disposal Groups [Abstract]
Outstanding membership interest	100.00%

X

- Definition

Outstanding membership interest.

+ References

No definition available.

+ Details

Name:	geg_OutstandingMembershipInterest
Namespace Prefix:	geg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

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- References

No definition available.

+ Details

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