CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Revenues	$ 699,308	$ 532,582	$ 470,559
Cost of goods sold	551,755	447,564	395,496
Gross profit	147,553	85,018	75,063
Selling, general and administrative expenses	78,813	70,831	67,217
Research and development expenses	6,220	6,963	6,670
Amortization of intangible assets	0	0	157
Operating income	62,520	7,224	1,019
Other income	0	(2,285)	0
Interest income, net	(6,430)	(334)	(73)
Income before income taxes	68,950	9,843	1,092
Income tax provision (benefit)	14,425	(3,894)	461
Net income	$ 54,525	$ 13,737	$ 631
Earnings per share:
Basic (in dollars per share)	$ 4.59	$ 1.16	$ 0.05
Diluted (in dollars per share)	$ 4.50	$ 1.15	$ 0.05
Weighted average shares:
Basic (in shares)	11,879	11,797	11,705
Diluted (in shares)	12,120	11,943	11,789
Dividends per share (in dollars per share)	$ 1.05	$ 1.04	$ 1.04