CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Revenues	$ 532,582	$ 470,559	$ 518,499
Cost of goods sold	447,564	395,496	423,924
Gross profit	85,018	75,063	94,575
Selling, general and administrative expenses	70,831	67,217	67,662
Research and development expenses	6,963	6,670	6,265
Amortization of intangible assets	0	157	177
Restructuring and other, net	0	0	1,400
Operating income	7,224	1,019	19,071
Other income	(2,285)	0	(506)
Interest income, net	(334)	(73)	(753)
Income before income taxes	9,843	1,092	20,330
Income tax provision (benefit)	(3,894)	461	3,670
Net income	$ 13,737	$ 631	$ 16,660
Earnings per share:
Basic (in dollars per share)	$ 1.16	$ 0.05	$ 1.43
Diluted (in dollars per share)	$ 1.15	$ 0.05	$ 1.42
Weighted average shares:
Basic (in shares)	11,797	11,705	11,624
Diluted (in shares)	11,943	11,789	11,693
Dividends per share (in dollars per share)	$ 1.04	$ 1.04	$ 1.04