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Non-Controlling Interests and Preferred Stock of Subsidiaries - Summary of Non-controlling Interests Balance on Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Net income (loss)
Total DME Inc.	$ (597)	$ (186)	$ (704)	$ (375)
DME, Inc.
Net income (loss)
Temporary equity	(292)	(78)	(337)	(158)
Permanent equity	(292)	(78)	(337)	(158)
Total DME Inc.	(584)	(156)	(674)	(316)
GP Corp.
Net income (loss)
Permanent equity	(30)	(43)	(60)	(85)
GE FM Holdings
Net income (loss)
Permanent equity	17	$ 13	30	$ 26
Forest
Net income (loss)
Permanent equity	$ 0		$ 0

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