Leases - Rental Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Sep. 30, 2021
Rental Equipment [Abstract]
Rental equipment, primarily wireless recording equipment	$ 85,912	$ 95,827
Accumulated depreciation and impairment	(55,002)	(56,922)
Rental equipment, net	$ 30,910	$ 38,905