Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2018	Jul. 31, 2017
Cash Flows from Operating Activities
Net Income	$ 8,222	$ 10,792
Adjustments to reconcile net income to net cash provided by operating activites:
Depreciation and amortization	12,756	12,772
Amortization of investment discounts	(129)	(47)
Non-cash stock compensation expense	1,600	1,507
Excess tax benefits for share-based payments	0	(424)
Deferred income taxes	7,270	2,408
Provision for bad debts and cash discounts	252	(13)
Loss on the sale of property, plant and equipment	84	326
Life insurance benefits	(340)	0
(Increase) decrease in:
Accounts receivable	(522)	(2,331)
Inventories	225	666
Prepaid expenses	(807)	(1,248)
Other assets	134	(694)
Increase (decrease) in:
Accounts payable	(2,436)	2,423
Accrued expenses	771	(845)
Deferred compensation	(5,437)	1,033
Pension and postretirement benefits	(11,048)	209
Other liabilities	17	415
Total Adjustments	2,390	16,157
Net Cash Provided by Operating Activities	10,612	26,949
Cash Flows from Investing Activities
Capital expenditures	(15,074)	(14,763)
Proceeds from sale of property, plant and equipment	48	64
Payments to Acquire Businesses and Interest in Affiliates	(730)	0
Purchases of short-term investments	(35,911)	(47,531)
Dispositions of short-term investments	52,492	34,186
Proceeds from life insurance	1,747	0
Net Cash Provided by (Used in) Investing Activities	2,572	(28,044)
Cash Flows from Financing Activities
Principal payments on notes payable	(3,083)	(3,083)
Dividends paid	(6,230)	(5,926)
Purchase of treasury stock	(26)	(135)
Proceeds from issuance of common stock	0	170
Excess tax benefits for share-based payments	0	424
Net Cash Used in Financing Activities	(9,339)	(8,550)
Effect of exchange rate changes on cash and cash equivalents	(183)	111
Net Increase (Decrease) in Cash and Cash Equivalents	3,662	(9,534)
Cash and Cash Equivalents, Beginning of Year	9,095	18,629
Cash and Cash Equivalents, End of Year	12,757	9,095
Cash paid for:
Interest, net of amounts capitalized	282	484
Income taxes	1,994	3,176
Noncash investing and financing activities:
Capital expenditures accrued, but not paid	997	1,557
Cash dividends declared and accrued, but not paid	$ 1,627	$ 1,553