CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
CONSOLIDATED STATEMENTS OF OPERATIONS
Net revenues	$ 127,474	$ 110,206	$ 234,543	$ 199,899
Cost of sales	112,791	96,693	208,525	177,311
Gross profit	14,683	13,513	26,018	22,588
Selling, general and administrative expense	10,663	12,262	21,791	23,009
Research and technical expense	859	965	1,693	1,853
Operating income (loss)	3,161	286	2,534	(2,274)
Nonoperating retirement benefit expense	856	2,083	1,712	4,171
Interest income	(18)	(17)	(38)	(35)
Interest expense	284	229	525	459
Income (loss) before income taxes	2,039	(2,009)	335	(6,869)
Provision for (benefit from) income taxes	530	59	429	17,725
Net income (loss)	$ 1,509	$ (2,068)	$ (94)	$ (24,594)
Net income (loss) per share:
Basic (in dollars per share)	$ 0.12	$ (0.17)	$ (0.01)	$ (1.99)
Diluted (in dollars per share)	$ 0.12	$ (0.17)	$ (0.01)	$ (1.99)
Weighted Average Common Shares Outstanding
Weighted average common shares outstanding - Basic	12,448,792	12,422,485	12,439,689	12,416,627
Weighted average common shares outstanding - Diluted	12,600,292	12,422,485	12,439,689	12,416,627
Dividends declared per common share (in dollars per share)	$ 0.22	$ 0.22	$ 0.44	$ 0.44