Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating Activities:
Net income (loss)	$ 4,998	$ (2,629)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization	7,206	7,899
Gain on sale of division	(2,006)	0
Stock-based compensation	2,308	2,135
Bad debt expense (recovery), net	274	194
Deferred income taxes	(5,548)	(586)
Changes in operating assets and liabilities:
Accounts receivable, net	(27,011)	(1,195)
Contract assets and liabilities, net	10,001	(35,673)
Inventories	(19,387)	991
Income taxes	(857)	(1,502)
Prepaid expenses and other current assets	18	1,490
Accounts payable	1,526	(2,202)
Accrued liabilities	(676)	(7,129)
Other, net	1,370	(1,486)
Net cash used in operating activities	(27,784)	(39,693)
Investing Activities:
Purchases of short-term investments	(15,104)	(19,868)
Maturities of short-term investments	11,873	19,821
Proceeds from sale of division	4,348	0
Purchases of property, plant and equipment	(1,765)	(2,480)
Proceeds from sale of property, plant and equipment	629	40
Proceeds from life insurance policies	0	474
Net cash used in investing activities	(19)	(2,013)
Financing Activities:
Payments on industrial development revenue bonds	(400)	(400)
Shares withheld in lieu of employee tax withholding	(663)	(632)
Dividends paid	(9,170)	(9,102)
Net cash used in financing activities	(10,233)	(10,134)
Net decrease in cash and cash equivalents	(38,036)	(51,840)
Effect of exchange rate changes on cash and cash equivalents	(448)	299
Cash and cash equivalents at beginning of period	114,314	160,216
Cash and cash equivalents at end of period	$ 75,830	$ 108,675