CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net loss	$ (9,021)	$ (15,378)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Deferred income tax expense (benefit)	(3)	195
Rental equipment depreciation	11,332	13,643
Property, plant and equipment depreciation	2,956	3,029
Amortization of intangible assets	1,299	1,299
Accretion of discounts on short-term investments	45
Stock-based compensation expense	1,510	1,682
Bad debt expense (recovery)	(32)	406
Inventory obsolescence expense	1,702	2,853
Change in estimate of collectability of rental revenue		7,993
Change in estimated fair value of contingent consideration	(1,713)	1,634
Gross profit from sale of used rental equipment	(6,546)	(698)
Loss (gain) on disposal of property, plant and equipment	6	(151)
Realized gain on sale of investments, net	(1,996)
Effects of changes in operating assets and liabilities:
Trade accounts and notes receivables	(4,621)	2,059
Unbilled receivables	(1,561)
Inventories	(4,920)	898
Deferred cost of revenue and other assets	6,756	(8,178)
Accounts payable trade	1,372	(1,654)
Deferred revenue and other liabilities	(4,080)	2,811
Net cash provided by (used in) operating activities	(7,515)	12,443
Cash flows from investing activities:
Purchase of property, plant and equipment	(2,451)	(2,559)
Proceeds from the sale of property, plant and equipment	3	204
Investment in rental equipment	(1,528)	(5,448)
Proceeds from the sale of used rental equipment	9,994	3,258
Purchases of short-term investments	(10,844)
Proceeds from the sale of short-term investments	1,100
Proceeds from sale of investment in debt security	2,069
Net cash used in investing activities	(1,657)	(4,545)
Cash flows from financing activities:
Purchase of treasury stock	(3,588)
Net cash used in financing activities	(3,588)
Effect of exchange rate changes on cash	144	(154)
Increase (decrease) in cash and cash equivalents	(12,616)	7,744
Cash and cash equivalents, beginning of fiscal year	32,686	18,925
Cash and cash equivalents, end of fiscal period	20,070	26,669
SUPPLEMENTAL CASH FLOW INFORMATION:
Cash paid for interest		31
Cash paid for income taxes	284	2,454
Inventory transferred to rental equipment	$ 3,777	$ 6,220