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Document and Entity Information
Nov. 21, 2022
Entity Listings [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Nov. 21, 2022
Entity File Number 001-39832
Entity Registrant Name Great Elm Group, Inc.
Entity Central Index Key 0001831096
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 85-3622015
Entity Address, Address Line One 800 South Street, Suite 230
Entity Address, City or Town Waltham
Entity Address, State or Province MA
Entity Address, Postal Zip Code 02453
City Area Code 617
Local Phone Number 375-3006
Entity Emerging Growth Company false
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Common Stock [Member]  
Entity Listings [Line Items]  
Title of 12(b) Security Common stock, par value $0.001 per share
Trading Symbol GEG
Security Exchange Name NASDAQ
7.25% Notes due 2027 [Member]  
Entity Listings [Line Items]  
Title of 12(b) Security 7.25% Notes due 2027
Trading Symbol GEGGL
Security Exchange Name NASDAQ