CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
CONSOLIDATED STATEMENTS OF OPERATIONS
Net revenues	$ 490,461	$ 337,661	$ 380,530
Cost of sales	384,128	297,931	335,898
Gross profit	106,333	39,730	44,632
Selling, general and administrative expense	47,089	43,470	40,307
Research and technical expense	3,822	3,403	3,713
Operating income (loss)	55,422	(7,143)	612
Nonoperating retirement benefit expense (income)	(4,655)	1,470	6,822
Interest income	(18)	(16)	(44)
Interest expense	2,481	1,186	1,332
Income (loss) before income taxes	57,614	(9,783)	(7,498)
Provision for (benefit from) income taxes	12,527	(1,100)	(1,020)
Net income (loss)	$ 45,087	$ (8,683)	$ (6,478)
Net income (loss) per share:
Basic (dollars per share)	$ 3.62	$ (0.71)	$ (0.53)
Diluted (dollars per share)	$ 3.57	$ (0.71)	$ (0.53)
Weighted Average Common Shares Outstanding
Basic (in shares)	12,346,025	12,499,609	12,470,664
Diluted (in shares)	12,505,500	12,499,609	12,470,664
Dividends declared per common share (dollars per share)	$ 0.88	$ 0.88	$ 0.88