Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Cash Flows from Operating Activities
Net Income	$ 8,356	$ 14,586	$ 6,098
Adjustments to reconcile net income to net cash provided by operating activites:
Depreciation and amortization	10,396	8,946	9,272
Amortization of investment (discounts) premiums	(2)	(7)	15
Non-cash stock compensation expense	1,189	864	727
Excess tax benefits for share-based payments	(86)	(268)	(92)
Deferred income taxes	284	(398)	(2,568)
Provision for bad debts	69	64	32
Loss on the sale of property, plant and equipment	452	8	445
Capacity rationalization charges	0	70	1,623
(Increase) decrease in:
Accounts receivable	82	(984)	(1,026)
Inventories	(2,966)	(1,050)	(456)
Prepaid expenses	(1,988)	1,416	1,878
Other assets	(817)	(1,025)	(510)
Increase (decrease) in:
Accounts payable	187	135	456
Accrued expenses	(2,586)	2,159	1,622
Deferred compensation	698	452	921
Pension and postretirement benefits	2,887	(1,896)	4,730
Other liabilities	141	294	172
Total Adjustments	7,940	8,780	17,241
Net Cash Provided by Operating Activities	16,296	23,366	23,339
Cash Flows from Investing Activities
Capital expenditures	(18,566)	(9,795)	(6,960)
Proceeds from sale of property, plant and equipment	180	66	31
Acquisition of business	(12,876)	0	0
Restricted cash	(129)	0	0
Purchases of short-term investments	(10,391)	(34,439)	(17,601)
Dispositions of short-term investments	26,212	25,150	24,260
Net Cash Used in Investing Activities	(15,570)	(19,018)	(270)
Cash Flows from Financing Activities
Principal payments on notes payable	(3,500)	(3,800)	(3,600)
Dividends paid	(4,965)	(4,630)	(4,486)
Purchase of treasury stock	(87)	(175)	(6,247)
Proceeds from issuance of treasury stock	82	82	31
Proceeds from issuance of common stock	12	805	321
Excess tax benefits for share-based payments	86	268	92
Net Cash Used in Financing Activities	(8,372)	(7,450)	(13,889)
Effect of exchange rate changes on cash and cash equivalents	(159)	44	28
Net (Decrease) Increase in Cash and Cash Equivalents	(7,805)	(3,058)	9,208
Cash and Cash Equivalents, Beginning of Year	24,035	27,093	17,885
Cash and Cash Equivalents, End of Year	$ 16,230	$ 24,035	$ 27,093