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Leases - Narrative (Details)
 6 Months Ended
Mar. 31, 2024
sublease_option
sublease
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Number of facilities subleased | sublease 1
Sublease term 5 years
Sublease number of additional extension options | sublease_option 2
Sublease extension option period 1 year
Weighted-average remaining lease term 5 years 9 months 18 days
Weighted-average discount rate 6.30%
Minimum | Facilities and Equipment  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Operating lease term (in years) 1 year
Maximum | Facilities and Equipment  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Operating lease term (in years) 7 years 3 months 18 days