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Restructuring Charges - Restructuring Activity (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Restructuring Reserve [Roll Forward]        
Accrued expenses (Beginning balance)     $ 0  
Restructuring charges $ 0 $ 0 7,909 $ 0
Cash payments     (7,689)  
Accrued expenses (Ending balance) $ 220   $ 220