Rental Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
Rental Equipment [Abstract]
Rental equipment, primarily wireless recording equipment	$ 107,645	$ 76,245
Accumulated depreciation and impairment	(45,583)	(36,700)
Rental equipment, net	$ 62,062	$ 39,545