Leases - Additional Information (Details)	6 Months Ended
	Mar. 31, 2020 extension_option
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term for operating leases	5 years 8 months 19 days
Weighted average incremental borrowing rate used to measure lease liabilities	8.25%
Minimum
Lessee, Lease, Description [Line Items]
Initial term of lease	3 years
Renewable term of lease	3 years
Maximum
Lessee, Lease, Description [Line Items]
Initial term of lease	10 years
Renewable term of lease	5 years
Corporate Office Lease
Lessee, Lease, Description [Line Items]
Number of extensions	2
Renewable term of lease	5 years