Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2018	Oct. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 934	$ 3,050
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,305	3,192
Amortization of investment net discount	(10)	(25)
Stock-based compensation	652	359
Deferred income taxes	53	111
Provision for bad debts and cash discounts	(43)	(22)
Loss on the sale of fixed assets	0	7
(Increase) Decrease in assets:
Accounts receivable	(6,367)	718
Inventories	(2,933)	(154)
Prepaid expenses	(1,196)	(1,361)
Other assets	(81)	75
Increase (Decrease) in liabilities:
Accounts payable	7,290	(825)
Accrued expenses	(1,780)	(3,275)
Deferred compensation	198	330
Pension and postretirement benefits	479	334
Other liabilities	183	54
Total Adjustments	(250)	(482)
Net Cash Provided by Operating Activities	684	2,568
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(4,058)	(4,045)
Proceeds from sale of property, plant and equipment	0	8
Purchases of short-term investments	(3,948)	(13,012)
Dispositions of short-term investments	8,430	18,480
Net Cash Provided by Investing Activities	424	1,431
CASH FLOWS FROM FINANCING ACTIVITIES
Principal payments on notes payable	(3,083)	(3,083)
Dividends paid	(1,627)	(1,553)
Purchase of treasury stock	(135)	(27)
Net Cash Used in Financing Activities	(4,845)	(4,663)
Effect of exchange rate changes on cash and cash equivalents	(1)	(30)
Net Decrease in Cash and Cash Equivalents	(3,738)	(694)
Cash and Cash Equivalents, Beginning of Period	12,757	9,095
Cash and Cash Equivalents, End of Period	9,019	8,401
Supplemental disclosure of non-cash investing and financing activities:
Capital expenditures accrued, but not paid	681	711
Cash dividends declared and accrued, but not paid	$ 1,656	$ 1,559