Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2015	Oct. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 5,423	$ 2,120
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,939	2,920
Amortization of investment net discount	0	(1)
Non-cash stock compensation expense	332	308
Excess tax benefits for share-based payments	(17)	(10)
Deferred income taxes	109	72
Provision for bad debts and cash discounts	(22)	44
Loss on the sale of fixed assets	23	33
Gain on sale of marketable securities	0	(105)
(Increase) Decrease in assets:
Accounts receivable	(414)	(940)
Inventories	(126)	151
Prepaid expenses	(862)	1,308
Other assets	(47)	(1,173)
Increase (Decrease) in liabilities:
Accounts payable	387	(1,632)
Accrued expenses	33	(2,000)
Deferred compensation	86	261
Pension and postretirement benefits	432	357
Other liabilities	240	35
Total Adjustments	3,093	(372)
Net Cash Provided by Operating Activities	8,516	1,748
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(1,765)	(5,717)
Proceeds from sale of property, plant and equipment	0	15
Restricted cash	0	29
Purchases of short-term investments	(1,690)	(700)
Dispositions of short-term investments	490	1,440
Proceeds from sale of marketable securities	0	108
Net Cash Used in Investing Activities	(2,965)	(4,825)
CASH FLOWS FROM FINANCING ACTIVITIES
Principal payments on notes payable	(3,484)	(3,500)
Dividends paid	(1,377)	(1,311)
Purchase of treasury stock	(18)	0
Proceeds from issuance of common stock	185	15
Excess tax benefits for share-based payments	17	10
Net Cash Used in Financing Activities	(4,677)	(4,786)
Effect of exchange rate changes on cash and cash equivalents	(1)	39
Net Increase (Decrease) in Cash and Cash Equivalents	873	(7,824)
Cash and Cash Equivalents, Beginning of Period	20,138	16,230
Cash and Cash Equivalents, End of Period	21,011	8,406
Supplemental disclosure of non-cash investing activities:
Capital expenditures accrued, but not paid	192	903
Cash dividends declared and accrued, but not paid	$ 1,406	$ 1,313