CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net income (loss)	$ (10,190)	$ 5,020	$ 30,486
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation	21,601	20,533	18,997
Amortization	496	503	511
Pension and post-retirement expense - U.S. and U.K.	23,435	19,048	12,592
Change in long-term obligations	(15)	73	(498)
Stock compensation expense	2,109	1,980	2,184
Excess tax expense from restricted stock vesting		153	55
Deferred revenue	(7,488)	2,488	(2,500)
Deferred income taxes	(10,072)	1,428	2,810
Loss on disposition of property	612	438	399
Change in assets and liabilities:
Restricted cash	5,446	(5,446)
Accounts receivable	755	10,965	(5,011)
Inventories	(6,982)	6,611	4,073
Other assets	287	237	117
Accounts payable and accrued expenses	3,476	(1,782)	(8,685)
Income taxes	709	3,773	(99)
Accrued pension and postretirement benefits	(11,052)	(12,035)	(7,036)
Net cash provided by operating activities	13,127	53,987	48,395
Cash flows from investing activities:
Additions to property, plant and equipment	(15,006)	(31,633)	(18,546)
Acquisition of Leveltek – LaPorte assets			(14,600)
Net cash used in investing activities	(15,006)	(31,633)	(33,146)
Cash flows from financing activities:
Dividends paid	(11,009)	(10,988)	(10,952)
Proceeds from exercise of stock options		310
Payment for purchase of treasury stock	(266)	(289)	(251)
Excess tax expense from restricted stock vesting		(153)	(55)
Payment for debt issuance cost		(291)
Payment on long-term obligation	(166)	(91)	(173)
Net cash used in financing activities	(11,441)	(11,502)	(11,431)
Effect of exchange rates on cash	351	(600)	(644)
Increase (decrease) in cash and cash equivalents:	(12,969)	10,252	3,174
Cash and cash equivalents:
Beginning of period	59,297	49,045	45,871
End of period	46,328	59,297	49,045
Supplemental disclosures of cash flow information:
Interest (net of capitalized interest)	807	486	347
Income taxes paid (refunded), net	2,335	(6,471)	14,017
Capital expenditures incurred but not yet paid	1,910	$ 1,869	1,741
Lease obligation incurred	$ 4,100		$ 4,500