Fair value asset level 1 to level 2 transfers amount.

No definition available.

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- Definition

Fair value assets level 2 to level 1 transfer amount.

+ References

No definition available.

+ Details

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- Definition

Fair value liabilities level 1 to level 2 transfer amount.

+ References

No definition available.

+ Details

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Namespace Prefix:	geg_
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Balance Type:	debit
Period Type:	instant

- Definition

Fair value liabilities level 2 to level 1 transfers amount

+ References

No definition available.

+ Details

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- Definition

Lockup period from date of investment.

+ References

No definition available.

+ Details

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- Definition

Notice period for annually allowable redemptions.

+ References

No definition available.

+ Details

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- Definition

Participation feature of HC LLC series A-2 preferred stock liability fair value disclosure.

+ References

No definition available.

+ Details

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- Definition

For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 30
-Section 50
-Paragraph 1
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of liability recognized arising from contingent consideration in a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
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-Paragraph 6
-URI https://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476

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Balance Type:	credit
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- Definition

Value of input used to measure contingent consideration liability from business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
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- Definition

Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as a liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959

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- Definition

Amount of transfers of financial instrument classified as a liability into level 3 of the fair value hierarchy.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
-Paragraph 2
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Period Type:	duration

- Definition

Amount of transfers of financial instrument classified as a liability out of level 3 of the fair value hierarchy.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(3)
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- Definition

Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(3)
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- Definition

Amount of transfers of financial instrument classified as an asset out of level 3 of the fair value hierarchy.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(3)
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Fair Value Measurements - Additional Information (Details)	3 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)	May 04, 2022 USD ($)	Aug. 31, 2021 USD ($)	Mar. 01, 2021 USD ($)
Fair value assets level 1 to level 2 transfers	$ 0	$ 0
Fair value assets level 2 to level 1 transfers	0	0
Fair value asset transfers into level 3	0	0
Fair value asset transfers out of level 3	0	0
Fair value liabilities level 1 to level 2 transfers	0	0
Fair value liabilities level 2 to level 1 transfers	0	0
Fair value liability transfers into level 3	0	0
Fair value liability transfers out of level 3	$ 0	$ 0
Notice period for annually allowable redemptions	90 days
Lockup period from date of investment	1 year
Valuation of participation feature	$ 0
Forest Investments, Inc. (Forest)
Fair value of embedded derivative liability	$ 900,000		$ 7,900,000
Volatility Rate \| Great Elm Healthcare, LLC (HC LLC)
Contingent consideration, fair value estimation	0.635		0.591
AMPM
Maximum additional consideration payable						$ 2,100,000
Contingent consideration, fair value estimation			0
MedOne
Maximum additional consideration payable					$ 1,000,000.0
Contingent consideration liability	$ 700,000
Monomoy Properties REIT, LLC
Maximum additional consideration payable				$ 2,000,000.0
Contingent consideration liability	$ 1,100,000		$ 1,100,000
Monomoy Properties REIT, LLC \| Volatility Rate
Contingent consideration, fair value estimation	0.192
Monomoy Properties REIT, LLC \| Discount Rate
Contingent consideration, fair value estimation	0.0875