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	9 Months Ended
Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Net income (loss)
Total DME Inc.	$ (158)	$ (301)	$ (862)	$ (676)
DME, Inc.
Net income (loss)
Temporary equity	(509)	(139)	(846)	(297)
Permanent equity	(509)	(139)	(846)	(297)
Total DME Inc.	(1,018)	(278)	(1,692)	(594)
GP Corp.
Net income (loss)
Permanent equity	(26)	(37)	(86)	(122)
GE FM Holdings
Net income (loss)
Permanent equity	15	$ 14	45	$ 40
GESOF
Net income (loss)
Permanent equity	(148)		(148)
Forest
Net income (loss)
Permanent equity	$ 1,019		$ 1,019

Amount of Net Income (Loss) attributable to noncontrolling interest.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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