Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net income (loss)	$ 7,768	$ (14,816)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Deferred income tax expense (benefit)	1	(12)
Rental equipment depreciation	9,204	10,500
Property, plant and equipment depreciation	2,785	3,112
Amortization of intangible assets	622	1,365
Amortization of premiums (accretion of discounts) on short-term investments	(50)	89
Stock-based compensation expense	1,074	1,342
Bad debt expense (recovery)	(41)	116
Inventory obsolescence expense	2,131	2,310
Change in estimated fair value of contingent consideration	0	(5,042)
Gross profit from sale of used rental equipment	(4,318)	(10,801)
Realized loss on short-term investments	0	22
Realized foreign currency translation loss from dissolution of foreign subsidiary	38	0
Effects of changes in operating assets and liabilities:
Trade accounts and notes receivable	(10,561)	1,455
Unbilled receivables	0	1,051
Inventories	(7,175)	(1,705)
Other assets	453	(250)
Accounts payable trade	1,290	(2,223)
Other liabilities	1,654	215
Net cash provided by (used in) operating activities	3,128	(13,281)
Cash flows from investing activities:
Purchase of property, plant and equipment	(1,862)	(913)
Investment in rental equipment	(6,213)	(4,121)
Proceeds from the sale of used rental equipment	11,095	5,929
Purchases of short-term investments	0	(450)
Proceeds from the sale of short-term investments	900	8,224
Net cash provided by investing activities	8,326	8,678
Cash flows from financing activities:
Payments on contingent consideration	(175)	(807)
Debt issuance costs	0	(211)
Purchase of treasury stock	0	(695)
Net cash used in financing activities	(175)	(1,713)
Effect of exchange rate changes on cash	(124)	(282)
Increase (decrease) in cash and cash equivalents	11,155	(6,598)
Cash and cash equivalents, beginning of fiscal year	16,109	14,066
Cash and cash equivalents, end of fiscal period	27,264	7,468
SUPPLEMENTAL CASH FLOW INFORMATION:
Cash paid for income taxes	111	168
Issuance of note receivable related to sale of used rental equipment	0	11,745
Inventory transferred to rental equipment	117	1,194
Inventory transferred to property, plant and equipment	0	172
Satellite Property [Member]
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Gain on disposal of property and equipment	(1,315)	0
Cash flows from investing activities:
Proceeds from the sale of property, plant and equipment	3,682	0
Equipment [Member]
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Gain on disposal of property and equipment	(432)	(9)
Cash flows from investing activities:
Proceeds from the sale of property, plant and equipment	$ 724	$ 9