Leases - Other Information (Details) $ in Thousands	12 Months Ended
	Sep. 30, 2020 USD ($)
Cash paid for leases [Abstract]
Cash paid for amounts included in the measurement of operating lease liabilities	$ 2,893
Right Of Use Asset Obtained In Exchange for Lease Liability [Abstract]
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 1,073
Weighted average remaining lease term [Abstract]
Weighted average remaining lease term- operating leases	5 years 7 months 6 days
Weighted Average Discount Rate Leases [Abstract]
Weighted average discount rate - operating leases	4.80%