CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
CONSOLIDATED STATEMENTS OF OPERATIONS
Net revenues	$ 490,215	$ 435,326	$ 395,209
Cost of sales	424,712	379,491	349,520
Gross profit	65,503	55,835	45,689
Selling, general and administrative expense	44,195	47,030	41,569
Research and technical expense	3,592	3,785	3,855
Operating income	17,716	5,020	265
Nonoperating retirement benefit expense	3,446	8,238	16,803
Interest income	(86)	(82)	(186)
Interest expense	986	918	865
Income (loss) before income taxes	13,370	(4,054)	(17,217)
Provision for (benefit from) income taxes	3,625	17,697	(7,027)
Net income (loss)	$ 9,745	$ (21,751)	$ (10,190)
Net income (loss) per share:
Basic (in dollars per share)	$ 0.78	$ (1.75)	$ (0.83)
Diluted (in dollars per share)	$ 0.78	$ (1.75)	$ (0.83)
Weighted Average Common Shares Outstanding
Weighted average common shares outstanding - Basic	12,445,212	12,419,564	12,397,099
Weighted average common shares outstanding - Diluted	12,480,908	12,419,564	12,397,099
Dividends declared per common share (in dollars per share)	$ 0.88	$ 0.88	$ 0.88