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Document And Entity Information
May 06, 2026
Document Information [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date May 06, 2026
Entity Registrant Name Great Elm Group, Inc.
Entity Central Index Key 0001831096
Entity Emerging Growth Company false
Entity File Number 001-39832
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 85-3622015
Entity Address, Address Line One 3801 PGA Boulevard
Entity Address, Address Line Two Suite 603
Entity Address, City or Town Palm Beach Gardens
Entity Address, State or Province FL
Entity Address, Postal Zip Code 33410
City Area Code 617
Local Phone Number 375-3006
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Common Stock [Member]  
Document Information [Line Items]  
Title of 12(b) Security Common Stock, par value $0.001 per share
Trading Symbol GEG
Security Exchange Name NASDAQ
Seven Point Two Five Percent Notes Due Two Thousand Twenty Seven [Member]  
Document Information [Line Items]  
Title of 12(b) Security 7.25% Notes due 2027
Trading Symbol GEGGL
Security Exchange Name NASDAQ