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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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