Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Revenues	$ 135,483	$ 115,813	$ 369,907	$ 341,105
Cost of goods sold	116,424	98,646	318,329	288,513
Gross profit	19,059	17,167	51,578	52,592
Selling, general and administrative expenses	16,404	16,710	49,374	50,259
Research and development expenses	1,806	1,772	5,342	5,046
Amortization of intangible assets	0	44	0	132
Operating income (loss)	849	(1,359)	(3,138)	(2,845)
Other income	(2,006)	0	(2,285)	0
Interest expense (income)	(63)	(21)	(79)	(78)
Income (loss) before income taxes	2,918	(1,338)	(774)	(2,767)
Income tax provision (benefit)	(6,143)	703	(5,772)	(138)
Net income (loss)	$ 9,061	$ (2,041)	$ 4,998	$ (2,629)
Income (loss) per share:
Basic (in dollars per share)	$ 0.77	$ (0.17)	$ 0.42	$ (0.22)
Diluted (in dollars per share)	$ 0.76	$ (0.17)	$ 0.42	$ (0.22)
Weighted average shares:
Basic (in shares)	11,810	11,720	11,792	11,700
Diluted (in shares)	11,901	11,720	11,877	11,700
Dividends per share (in dollars per share)	$ 0.26	$ 0.26	$ 0.78	$ 0.78