Preferred Stock Holding Percentage.

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Redeemable preferred stock liability dividend rate percentage.

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Redeemable preferred stock liability redemption price per share.

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Redeemable preferred stock liability shares issued.

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Reimbursement amount received to cover costs.

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Reorganizations.

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Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition.

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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Date the plan of reorganization is effective, in YYYY-MM-DD format.

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Description of the terms of equity securities to be issued or to be issued to prepetition creditors in accordance with the plan of reorganization, including the amount and impact, if any, on diluted earnings per share.

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Reorganization and Financing Transactions - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Dec. 29, 2020	Jun. 30, 2022	Jun. 29, 2021	May 31, 2021
Reorganizations [Line Items]
Reorganization date		Dec. 21, 2020
Plan of reorganization, description of equity securities issued or to be issued		On December 29, 2020, pursuant to the terms of the Agreement and Plan of Merger, dated as of December 21, 2020, among Forest (formerly GEC), the Company and Forest Merger Sub, Inc., a newly created entity for the purpose of facilitating the Merger, (as it may be amended from time to time, the Merger Agreement), the transactions contemplated by the Merger Agreement (the Transactions) were consummated. As a result of the Transactions, and subject to the same terms and conditions as applied immediately prior to the Transactions, each share of Forest's outstanding common stock, common stock options, restricted stock units and restricted shares were exchanged for identical instruments of the Company
DME, Inc.
Reorganizations [Line Items]
Cash	$ 1,900
Ownership percentage				80.10%
GP Corp.
Reorganizations [Line Items]
Ownership percentage			98.20%
Forest Merger Sub Inc \| J.P. Morgan Broker-Dealer Holdings Inc. (JPM)
Reorganizations [Line Items]
JPM financing arrangement aggregate amount	$ 37,700
Forest Investments, Inc. (Forest) \| J.P. Morgan Broker-Dealer Holdings Inc. (JPM)
Reorganizations [Line Items]
JPM acquired percentage	20.00%
Business acquisition, common stock purchase price	$ 2,700
Business acquisition, annual consulting fees	$ 450
Forest Investments, Inc. (Forest) \| Forest Preferred Stock Classified as Liability
Reorganizations [Line Items]
Redeemable preferred stock, shares	35,010
Redeemable preferred stock, annual dividend rate	9.00%
Redeemable Preferred stock, redemption price per share	$ 1,000.00
Forest Investments, Inc. (Forest) \| Series A-1 Preferred Stock Classified as Liability
Reorganizations [Line Items]
Redeemable preferred stock, shares	(3,276)
Great Elm Healthcare, LLC (HC LLC)
Reorganizations [Line Items]
Reimbursement amount received to cover deal costs	$ 1,300
Great Elm Healthcare, LLC (HC LLC) \| Series A-2 Preferred Stock Classified as Liability
Reorganizations [Line Items]
Redeemable preferred stock, shares	34,010
Redeemable preferred stock, annual dividend rate	9.00%
Redeemable Preferred stock, redemption price per share	$ 1,000.00
Great Elm Healthcare, LLC (HC LLC) \| DME, Inc.
Reorganizations [Line Items]
Ownership percentage				80.10%
Great Elm Healthcare, LLC (HC LLC) \| Series A-1 Preferred Stock Classified as Liability
Reorganizations [Line Items]
Redeemable preferred stock, shares	10,090
Redeemable preferred stock, annual dividend rate	9.00%
Redeemable Preferred stock, redemption price per share	$ 1,000
Great Elm Healthcare, LLC (HC LLC) \| Series A-1 Preferred Stock Classified as Liability \| Forest Investments, Inc. (Forest)
Reorganizations [Line Items]
Preferred stock holding percentage	80.10%
Great Elm Healthcare, LLC (HC LLC) \| Series A-1 Preferred Stock Classified as Liability \| Corbel Capital Partners SBIC, L.P. (Corbel)
Reorganizations [Line Items]
Preferred stock holding percentage	9.95%
Great Elm Healthcare, LLC (HC LLC) \| Series A-1 Preferred Stock Classified as Liability \| Valley Healthcare Holdings, LLC (VHH)
Reorganizations [Line Items]
Preferred stock holding percentage	9.95%
Forest G E C G P \| GP Corp.
Reorganizations [Line Items]
Ownership percentage			98.20%