Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net loss	$ (14,056)	$ (19,242)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Deferred income tax expense	3	181
Rental equipment depreciation	15,075	17,945
Property, plant and equipment depreciation	3,956	4,016
Amortization of intangible assets	1,746	1,732
Goodwill impairment		671
Accretion of discounts on short-term investments	96
Stock-based compensation expense	1,970	2,305
Bad debt expense (recovery)	(76)	63
Inventory obsolescence expense	3,001	4,726
Change in estimate of collectability of rental revenue		7,993
Change in estimated fair value of contingent consideration	(3,524)	1,100
Gross profit from sale of used rental equipment	(6,678)	(743)
Gain on disposal of property, plant and equipment		(116)
Realized gain on sale of investments, net	(1,993)
Effects of changes in operating assets and liabilities:
Trade accounts and notes receivables	(2,973)	2,482
Unbilled receivables	(1,051)
Inventories	(7,674)	5
Deferred cost of revenue and other assets	5,368	(7,786)
Accounts payable trade	4,712	(2,453)
Deferred revenue and other liabilities	(5,074)	5,243
Net cash provided by (used in) operating activities	(7,172)	18,122
Cash flows from investing activities:
Purchase of property, plant and equipment	(3,188)	(2,916)
Investment in rental equipment	(2,121)	(5,487)
Proceeds from the sale of property, plant and equipment	16	204
Proceeds from the sale of used rental equipment	10,626	4,149
Purchase of short-term investments	(12,544)
Proceeds from the sale of short-term investments	3,170
Business acquisition, net of acquired cash	(1,346)
Proceeds from sale of investment in debt security	2,069
Net cash used in investing activities	(3,318)	(4,050)
Cash flows from financing activities:
Payments on contingent consideration	(1,421)	(78)
Purchase of treasury stock	(6,805)
Net cash used in financing activities	(8,226)	(78)
Effect of exchange rate changes on cash	96	(233)
Increase (decrease) in cash and cash equivalents	(18,620)	13,761
Cash and cash equivalents, beginning of fiscal year	32,686	18,925
Cash and cash equivalents, end of fiscal year	$ 14,066	$ 32,686