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Commitments and Contingencies (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2022
Operating Leased Assets [Line Items]      
Educational services and facilities $ 384,529 $ 329,870 $ 207,233
Net prepaid expenses from excess of credits earned over credits used 300 1,900  
Accrued tool sets 4,807 4,096  
Liability to vendor for vouchers redeemed by students 600 500  
Surety Bond      
Operating Leased Assets [Line Items]      
Maximum principal amount 22,900    
Licensing Agreement      
Operating Leased Assets [Line Items]      
Educational services and facilities $ 2,400 $ 2,300 $ 2,100