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Goodwill - Narrative (Details) $ in Thousands		3 Months Ended	9 Months Ended
	Dec. 01, 2022 USD ($) segment	Dec. 31, 2022 segment	Jun. 30, 2023 USD ($) segment	Sep. 30, 2022 USD ($)	Nov. 01, 2021 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 1998 USD ($)
Finite-Lived Intangible Assets [Line Items]
Goodwill			$ 28,459	$ 16,859		$ 16,859
Number of reportable segments | segment	2	2	2
Concorde
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 11,600		$ 11,600
MIAT College of Technology
Finite-Lived Intangible Assets [Line Items]
Goodwill					$ 8,637
Motorcycle And Marine Education Business
Finite-Lived Intangible Assets [Line Items]
Goodwill							$ 8,200

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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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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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