Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Operating Activities:
Net income (loss)	$ 1,162	$ (2,846)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation	2,136	2,414
Stock-based compensation	1,307	1,008
Bad debt expense, net	6	91
Deferred income taxes	(895)	(915)
Changes in operating assets and liabilities:
Accounts receivable, net	(44,547)	(1,189)
Contract assets and liabilities, net	78,298	(6,730)
Inventories	(4,406)	(6,312)
Income taxes	1,048	(578)
Prepaid expenses and other current assets	368	857
Accounts payable	(24,149)	(2,918)
Accrued liabilities	(12,741)	(11,035)
Other, net	1,864	320
Net cash used in operating activities	(549)	(27,833)
Investing Activities:
Purchases of short-term investments	0	(3,937)
Maturities of short-term investments	3,690	0
Purchases of property, plant and equipment	(2,726)	(436)
Proceeds from sale of property, plant and equipment	11	0
Net cash provided by (used in) investing activities	975	(4,373)
Financing Activities:
Payments on industrial development revenue bonds	0	(400)
Shares withheld in lieu of employee tax withholding	(423)	(660)
Dividends paid	(3,074)	(3,048)
Net cash used in financing activities	(3,497)	(4,108)
Net decrease in cash and cash equivalents	(3,071)	(36,314)
Effect of exchange rate changes on cash and cash equivalents	749	(95)
Cash and cash equivalents at beginning of period	101,954	114,314
Cash and cash equivalents at end of period	$ 99,632	$ 77,905