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Accounts Payable and Accrued Expenses (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Sep. 30, 2020
Payables and Accruals [Abstract]    
Accounts payable $ 13,702 $ 12,471
Accrued compensation and benefits 29,506 28,053
Other accrued expenses 11,189 11,367
Accounts payable and accrued expenses $ 54,397 $ 51,891