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Intangible Assets - Schedule of Intangible Assets (Details) - USD ($)
$ in Thousands
 9 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Finite-Lived Intangible Assets [Line Items]    
Accumulated Amortization $ (894) $ (398)
Gross Carrying Value 20,042 16,642
Net Book Value $ 19,148 $ 16,244
Weighted Average Remaining Useful Life (Years) 4 years 9 months 3 years 11 months 26 days
Trademarks, trade names and other    
Finite-Lived Intangible Assets [Line Items]    
Finite-lived intangible assets, gross carrying amount $ 1,942  
Accumulated Amortization (597)  
Finite-lived intangible assets, net book value $ 1,345  
Weighted Average Remaining Useful Life (Years) 5 years 4 months 2 days  
Curriculum    
Finite-Lived Intangible Assets [Line Items]    
Finite-lived intangible assets, gross carrying amount $ 1,800 $ 400
Accumulated Amortization (297) (53)
Finite-lived intangible assets, net book value $ 1,503 $ 347
Weighted Average Remaining Useful Life (Years) 4 years 2 months 19 days 4 years 3 months 29 days
Non-compete agreement and trade name    
Finite-Lived Intangible Assets [Line Items]    
Finite-lived intangible assets, gross carrying amount   $ 442
Accumulated Amortization   (345)
Finite-lived intangible assets, net book value   $ 97
Gross Carrying Value $ 400  
Weighted Average Remaining Useful Life (Years)   2 years 9 months 29 days
Accreditations and regulatory approvals    
Finite-Lived Intangible Assets [Line Items]    
Indefinite-lived intangible assets, gross carrying amount 16,300 $ 12,800
Indefinite-lived intangible assets, net book value $ 16,300 12,800
Trademarks, trade names and other    
Finite-Lived Intangible Assets [Line Items]    
Indefinite-lived intangible assets, gross carrying amount   3,000
Indefinite-lived intangible assets, net book value   $ 3,000