Leases - Additional Information (Details)	3 Months Ended
	Dec. 31, 2020 USD ($) OperatingRightOfUseAsset	Dec. 31, 2019 USD ($)
Leases [Line Items]
Right-of-use asset, operating lease costs	$ 38,000	$ 38,000
Short-term lease costs	$ 74,000	76,000
Lessee operating lease, discount rate	5.00%
Lease receivables from customers, net of reserves	$ 3,900,000
Rental revenue	1,738,000	$ 8,622,000
Future minimum lease payments to be received	$ 3,000,000.0
Maximum
Leases [Line Items]
Operating lease term	7 years
Lease term	6 months
Austin, Texas
Leases [Line Items]
Number of operating right-of use asset related to leased facility | OperatingRightOfUseAsset	1
Operating lease term	2 years
Operating lease, right-of-use asset	$ 40,000
Future minimum lease payments due in fiscal 2021	$ 42,000
Austin, Texas | New Operating Lease
Leases [Line Items]
Operating lease term	7 years
Future minimum lease payments	$ 900,000