Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Total rental received included in rent expense	$ 103	$ 145
Wireless
Lessee, Lease, Description [Line Items]
Total rental received included in rent expense	46	45
Telco
Lessee, Lease, Description [Line Items]
Total rental received included in rent expense	$ 57	$ 100