Leases - Other Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Right Of Use Asset Obtained In Exchange for Lease Liability [Abstract]
Cash paid for amounts included in the measurement of operating lease liabilities		$ 0	$ 1,784
Business Combination, Recognized Identifiable Asset Acquired and Liability Assumed, Lease Obligation	$ 0	699	0
Cash paid for leases [Abstract]
Right-of-use assets obtained in exchange for new operating lease liability		0	3,919
Tenant improvement allowance	$ 1,000	$ 0	$ 1,000
Weighted average remaining lease term [Abstract]
Weighted average remaining lease term- operating leases		8 years 7 months 6 days
Weighted Average Discount Rate Leases [Abstract]
Weighted average discount rate - operating leases		2.80%