Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Supplemental Cash Flow Elements [Abstract]
Cash paid for interest	$ 99	$ 336
Cash paid (refunded) for income taxes	2,402	(649)
Non-cash investing and financing activities:
Inventory transferred to rental equipment	1,861	29,248
Inventory transferred to property, plant and equipment	126	109
Financing receivables in connection with sale of used rental equipment		$ 3,984
Property, plant and equipment acquired in connection with business acquisition	1,721
Extinguishment of financing receivable in connection with repossession of equipment added to rental fleet	$ 750