Leases - Narrative (Details)	6 Months Ended
	Mar. 31, 2022 sublease sublease_option
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	7 years 10 months 24 days
Weighted-average discount rate	6.00%
Facilities and Equipment | Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Remaining lease term	8 months 12 days
Facilities and Equipment | Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Remaining lease term	9 years