Leases - Narrative (Details) $ in Thousands	9 Months Ended
	Jun. 30, 2025 USD ($) sublease sublease_option	Jun. 30, 2024 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease liability recognized to acquire a right-of-use asset | $	$ 4,187	$ 0
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 7 months 6 days
Weighted-average discount rate	6.90%
Minimum | Facilities and Equipment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease term (in years)	1 year 6 months
Maximum | Facilities and Equipment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease term (in years)	7 years 7 months 6 days