Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 7,168	$ 6,598
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	4,860	4,475
Amortization of investment net discount	(2)	(3)
Non-cash stock compensation expense	560	413
Excess tax benefits for share-based payments	(21)	(199)
Deferred income taxes	79	184
Provision for bad debts	45	36
Loss on the sale of fixed assets	13	7
Capacity rationalization charges	0	62
(Increase) Decrease in assets, net of acquisition:
Accounts receivable	(5,919)	(812)
Inventories	(1,347)	(2,513)
Prepaid expenses	(725)	879
Other assets	(312)	24
Increase (Decrease) in liabilities, net of acquisition:
Accounts payable	381	(168)
Accrued expenses	(3,558)	690
Deferred compensation	407	281
Pension and postretirement benefits	528	882
Other liabilities	243	(25)
Total Adjustments	(4,768)	4,213
Net Cash Provided by Operating Activities	2,400	10,811
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(6,782)	(5,009)
Proceeds from sale of property, plant and equipment	16	34
Acquisition of business	(12,505)	0
Restricted cash	(500)	0
Purchases of short-term investments	(7,991)	(12,147)
Dispositions of short-term investments	19,352	10,925
Net Cash Used in Investing Activities	(8,410)	(6,197)
CASH FLOWS FROM FINANCING ACTIVITIES
Principal payments on notes payable	(3,500)	(2,300)
Dividends paid	(2,478)	(4,630)
Purchase of treasury stock	(13)	(175)
Proceeds from issuance of treasury stock	39	82
Proceeds from issuance of common stock	12	571
Excess tax benefits for share-based payments	21	199
Net Cash Used in Financing Activities	(5,919)	(6,253)
Effect of exchange rate changes on cash and cash equivalents	(24)	(24)
Net Decrease in Cash and Cash Equivalents	(11,953)	(1,663)
Cash and Cash Equivalents, Beginning of Period	24,035	27,093
Cash and Cash Equivalents, End of Period	$ 12,082	$ 25,430