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Goodwill - Goodwill Reportable Segment (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Goodwill [Line Items]
Goodwill	$ 28,459	$ 16,859	$ 16,859
UTI
Goodwill [Line Items]
Goodwill	16,859	16,859
Concorde
Goodwill [Line Items]
Goodwill	$ 11,600	$ 0

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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