Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jan. 31, 2013	Jan. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 6,598	$ 4,314
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	4,475	4,634
Amortization of investment net (discount) premium	(3)	17
Non-cash stock compensation expense	413	340
Excess tax benefits for share-based payments	(199)	(45)
Deferred income taxes	184	65
Provision for bad debts	36	45
Loss on the sale of fixed assets	7	147
Capacity rationalization charges	62	0
(Increase) Decrease in:
Accounts receivable	(812)	265
Inventories	(2,513)	(2,410)
Prepaid expenses	879	2,417
Other assets	24	(349)
Increase (Decrease) in:
Accounts payable	(168)	(179)
Accrued expenses	690	(98)
Deferred compensation	281	116
Pension and postretirement benefits	882	952
Other liabilities	(25)	50
Total Adjustments	4,213	5,967
Net Cash Provided by Operating Activities	10,811	10,281
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(5,009)	(3,512)
Proceeds from sale of property, plant and equipment	34	23
Purchases of investment in short-term securities	(12,147)	(10,565)
Dispositions of investment in short-term securities	10,925	17,420
Net Cash (Used in) Provided by Investing Activities	(6,197)	3,366
CASH FLOWS FROM FINANCING ACTIVITIES
Principal payments on notes payable	(2,300)	(2,100)
Dividends paid	(4,630)	(2,262)
Purchase of treasury stock	(175)	0
Proceeds from issuance of treasury stock	82	31
Proceeds from issuance of common stock	571	90
Excess tax benefits for share-based payments	199	45
Net Cash Used in Financing Activities	(6,253)	(4,196)
Effect of exchange rate changes on cash and cash equivalents	(24)	23
Net (Decrease) Increase in Cash and Cash Equivalents	(1,663)	9,474
Cash and Cash Equivalents, Beginning of Period	27,093	17,885
Cash and Cash Equivalents, End of Period	$ 25,430	$ 27,359