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Document and Entity Information
Feb. 13, 2023
Feb. 02, 2023
Entity Listings [Line Items]    
Document Type   8-K
Amendment Flag   false
Document Period End Date Feb. 13, 2023  
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   800 South Street
Entity Address, Address Line Two   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
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