CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net loss	$ (8,242)	$ (8,234)
Adjustments to reconcile net loss to net cash used in operating activities:
Deferred income tax benefit	(7)	(1)
Rental equipment depreciation	7,205	7,772
Property, plant and equipment depreciation	2,071	1,970
Amortization of intangible assets	893	866
Accretion of discounts on short-term investments	76	3
Stock-based compensation expense	954	1,027
Bad debt expense	28	8
Inventory obsolescence expense	1,106	1,155
Change in estimated fair value of contingent consideration	(4,658)	(918)
Gross profit from sale of used rental equipment	(10,741)	(4,150)
Loss on disposal of property, plant and equipment		6
Realized loss (gain) on sale of investments	18	(269)
Effects of changes in operating assets and liabilities:
Trade accounts and notes receivables	4,666	190
Unbilled receivables	1,051	(2,707)
Inventories	(1,313)	(6,652)
Other assets	1,027	6,525
Accounts payable trade	(1,746)	3,629
Other liabilities	(2,720)	(4,153)
Net cash used in operating activities	(10,332)	(3,933)
Cash flows from investing activities:
Purchase of property, plant and equipment	(509)	(1,673)
Proceeds from the sale of property, plant and equipment		2
Investment in rental equipment	(2,368)	(59)
Proceeds from the sale of used rental equipment	3,000	9,991
Purchases of short-term investments	(450)	(3,800)
Proceeds from the sale of short-term investments	6,174
Proceeds from sale of investment in debt security		269
Net cash provided by investing activities	5,847	4,730
Cash flows from financing activities:
Payments on contingent consideration	(807)
Purchase of treasury stock	(695)	(2,328)
Net cash used in financing activities	(1,502)	(2,328)
Effect of exchange rate changes on cash	132	91
Decrease in cash, cash equivalents and restricted cash	(5,855)	(1,440)
Cash and cash equivalents, beginning of fiscal year	14,066	32,686
Cash, cash equivalents and restricted cash, end of fiscal period	8,211	31,246
SUPPLEMENTAL CASH FLOW INFORMATION:
Cash paid for income taxes	81	70
Issuance of notes receivable in connection with sale of used rental equipment	11,745
Inventory transferred to (from) rental equipment	814	$ (504)
Inventory transferred to property, plant and equipment	$ 172