CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
CONSOLIDATED STATEMENTS OF OPERATIONS
Net revenues	$ 117,056	$ 82,063	$ 216,486	$ 154,240
Cost of sales	93,643	73,678	175,296	144,868
Gross profit	23,413	8,385	41,190	9,372
Selling, general and administrative expense	11,782	11,257	23,144	20,990
Research and technical expense	944	864	1,849	1,651
Operating income (loss)	10,687	(3,736)	16,197	(13,269)
Nonoperating retirement benefit expense (income)	(1,088)	359	(2,176)	718
Interest income	(6)	(1)	(14)	(5)
Interest expense	514	298	814	602
Income (loss) before income taxes	11,267	(4,392)	17,573	(14,584)
Provision for (benefit from) income taxes	2,783	(760)	4,430	(2,925)
Net income (loss)	$ 8,484	$ (3,632)	$ 13,143	$ (11,659)
Net income (loss) per share:
Basic (dollars per share)	$ 0.68	$ (0.29)	$ 1.05	$ (0.94)
Diluted (dollars per share)	$ 0.67	$ (0.29)	$ 1.04	$ (0.94)
Weighted Average Common Shares Outstanding
Basic (in shares)	12,330,567	12,514,208	12,349,904	12,503,479
Diluted (in shares)	12,474,183	12,514,208	12,530,842	12,503,479
Dividends declared per common share (dollars per share)	$ 0.22	$ 0.22	$ 0.44	$ 0.44