Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Revenues	$ 171,444	$ 127,854	$ 298,302	$ 234,423
Cost of goods sold	138,007	108,771	245,401	201,904
Gross profit	33,437	19,083	52,901	32,519
Selling, general and administrative expenses	21,820	17,067	38,693	32,969
Research and development expenses	1,543	1,713	3,044	3,537
Operating income (loss)	10,074	303	11,164	(3,987)
Other income	0	(279)	0	(279)
Interest income, net	(899)	(13)	(1,423)	(16)
Income (loss) before income taxes	10,973	595	12,587	(3,692)
Income tax provision	2,500	1,812	2,951	371
Net income (loss)	$ 8,473	$ (1,217)	$ 9,636	$ (4,063)
Earnings (loss) per share:
Basic (in dollars per share)	$ 0.71	$ (0.10)	$ 0.81	$ (0.34)
Diluted (in dollars per share)	$ 0.70	$ (0.10)	$ 0.80	$ (0.34)
Weighted average shares:
Basic (in shares)	11,878	11,801	11,869	11,783
Diluted (in shares)	12,149	11,801	12,109	11,783
Dividends per share (in dollars per share)	$ 0.26	$ 0.26	$ 0.52	$ 0.52