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Acquisitions - Schedule of Intangible Assets Acquired (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 01, 2022 | Nov. 01, 2021
Asset Acquisition [Line Items] |  |  |  |  |
Net Book Value | $ 18,229 | $ 18,975 |  |  |
Intangible asset impairment charge | 0 | 0 | $ 2,000 |  |
Concorde |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |
Net Book Value |  |  |  | $ 5,400 |
MIAT College Of Technology |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |
Net Book Value |  |  |  |  | $ 16,200
Intangible asset impairment charge |  |  | $ 2,000 |  |
Trademarks and trade names |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |
Finite-lived intangible assets, net book value | 876 | 1,262 |  |  |
Trademarks and trade names | Concorde |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |
Useful life |  |  |  | 10 years |
Finite-lived intangible assets, net book value |  |  |  | $ 500 |
Curriculum development |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |
Finite-lived intangible assets, net book value | 1,053 | 1,413 |  |  |
Curriculum development | Concorde |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |
Useful life |  |  |  | 5 years |
Finite-lived intangible assets, net book value |  |  |  | $ 1,400 |
Curriculum development | MIAT College Of Technology |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |
Useful life |  |  |  |  | 5 years
Finite-lived intangible assets, net book value |  |  |  |  | $ 400
Accreditations and regulatory approvals |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |
Indefinite-lived intangible assets, gross carrying amount | $ 16,300 | $ 16,300 |  |  |
Accreditations and regulatory approvals | Concorde |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |
Indefinite-lived intangible assets, gross carrying amount |  |  |  | $ 3,500 |
Accreditations and regulatory approvals | MIAT College Of Technology |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |
Indefinite-lived intangible assets, gross carrying amount |  |  |  |  | 12,800
Trademarks and trade names | MIAT College Of Technology |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |
Useful life |  |  | 4 years |  |
Indefinite-lived intangible assets, gross carrying amount |  |  |  |  | $ 3,000
Fair value of intangible asset |  |  | $ 1,000 |  |

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