Leases - Other Information Related to Leases (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Mar. 31, 2020 USD ($)	Mar. 31, 2020 USD ($)
Leases [Abstract]
Weighted-average remaining lease term	9 years 8 months 12 days	9 years 8 months 12 days
Weighted-average discount rate	6.03%	6.03%
Cash paid for amounts included in the measurement of lease liabilities	$ 1,197	$ 2,467
Lease liabilities arising from obtaining right-of-use-assets	$ 0	$ 245