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Supporting Financial Information - Accrued Payroll (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Accrued leave $ 7,975 $ 9,621
Accrued payroll 2,558 2,487
Accrued payroll taxes 1,025 1,173
Accrued severance 198 513
Total accrued payroll $ 11,756 $ 13,794