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Goodwill - Schedule of Goodwill (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Jun. 30, 2023
Sep. 30, 2022
Goodwill [Roll Forward]    
Goodwill at the beginning of the period $ 16,859 $ 16,859
Additions to Goodwill for acquisition of Concorde 11,600 0
Goodwill at the end of the period $ 28,459 $ 16,859