Leases - Narrative (Details)	9 Months Ended
	Jun. 30, 2023 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	6 years 3 months 18 days
Weighted-average discount rate	6.40%
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 10 months 24 days