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Intangible Assets - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2023
Mar. 31, 2022
Finite-Lived Intangible Assets, Net [Abstract]        
Amortization expense $ 1.0 $ 1.0 $ 2.0 $ 1.8