Leases - Rental Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Sep. 30, 2019
Leases [Abstract]
Rental equipment, primarily wireless recording equipment	$ 114,990	$ 107,645
Accumulated depreciation and impairment	(52,301)	(45,583)
Rental equipment, net	$ 62,689	$ 62,062