Organization	6 Months Ended
Dec. 31, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization	1. Organization Great Elm Group, Inc. (the Company) is a holding company incorporated in Delaware. The Company currently has three business operating segments: durable medical equipment, investment management and real estate, with general corporate representing unallocated costs and activity to arrive at consolidated operations. The Company is pursuing business development opportunities in durable medical equipment, investment management, real estate and other industries. On December 29, 2020, the Company completed a reorganization of the Company's corporate structure, where Great Elm Capital Group, Inc. (GEC) changed its name to Forest Investments, Inc. (Forest) and became a wholly owned subsidiary of a new holding company, Great Elm Group, Inc. Outstanding shares of Forest under the ticker symbol “GEC” were automatically converted into shares of common stock of Great Elm Group, Inc., ticker symbol “GEG”. Forest common stock was then delisted from the NASDAQ Global Select Market and subsequently deregistered under Section 12(b) of the Exchange Act. The Holding Company Reorganization (as defined in Note 4 – Holding Company Reorganization) was a tax-free transaction for U.S. federal income tax purposes for the Company’s shareholders. The accompanying condensed consolidated financial statements include the accounts of the Company and its wholly-owned and majority-owned subsidiaries. Wholly-owned subsidiaries include Great Elm Capital Management, Inc. (GECM), Great Elm Opportunities GP, Inc., Great Elm DME Holdings, Inc. and Great Elm DME Manager, LLC. Majority-owned subsidiaries include Forest, GECC GP Corp., Great Elm FM Acquisition, Inc., Great Elm FM Holdings, Inc., CRIC IT Fort Myers, LLC (CRIC IT), Great Elm DME, Inc. (DME Inc.) and Great Elm Healthcare, LLC (HC LLC) and its seven wholly-owned subsidiaries.

Organization

6 Months Ended

Dec. 31, 2020

Organization Consolidation And Presentation Of Financial Statements [Abstract]

1. Organization

Great Elm Group, Inc. (the Company) is a holding company incorporated in Delaware. The Company currently has three business operating segments: durable medical equipment, investment management and real estate, with general corporate representing unallocated costs and activity to arrive at consolidated operations. The Company is pursuing business development opportunities in durable medical equipment, investment management, real estate and other industries.

On December 29, 2020, the Company completed a reorganization of the Company's corporate structure, where Great Elm Capital Group, Inc. (GEC) changed its name to Forest Investments, Inc. (Forest) and became a wholly owned subsidiary of a new holding company, Great Elm Group, Inc. Outstanding shares of Forest under the ticker symbol “GEC” were automatically converted into shares of common stock of Great Elm Group, Inc., ticker symbol “GEG”. Forest common stock was then delisted from the NASDAQ Global Select Market and subsequently deregistered under Section 12(b) of the Exchange Act. The Holding Company Reorganization (as defined in Note 4 – Holding Company Reorganization) was a tax-free transaction for U.S. federal income tax purposes for the Company’s shareholders.

The accompanying condensed consolidated financial statements include the accounts of the Company and its wholly-owned and majority-owned subsidiaries. Wholly-owned subsidiaries include Great Elm Capital Management, Inc. (GECM), Great Elm Opportunities GP, Inc., Great Elm DME Holdings, Inc. and Great Elm DME Manager, LLC. Majority-owned subsidiaries include Forest, GECC GP Corp., Great Elm FM Acquisition, Inc., Great Elm FM Holdings, Inc., CRIC IT Fort Myers, LLC (CRIC IT), Great Elm DME, Inc. (DME Inc.) and Great Elm Healthcare, LLC (HC LLC) and its seven wholly-owned subsidiaries.