Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 423	$ 10,423
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	10,034	10,653
Non-cash stock-based compensation	2,267	1,849
Deferred income taxes	(1,311)	716
Provision for bad debts and cash discounts	(1)	(107)
Loss on Impairment of Goodwill	5,644	0
Loss on impairment of patent applications	323	0
Loss on the disposals of property, plant and equipment	346	10
(Increase) Decrease in assets:
Accounts receivable	(2,453)	(3,864)
Inventories	(11,456)	524
Prepaid expenses	181	(2,117)
Other assets	971	(1,066)
Increase (Decrease) in liabilities:
Accounts payable	1,333	(4,227)
Accrued expenses	1,120	(4,070)
Deferred compensation	556	602
Pension and postretirement benefits	(924)	(656)
Other liabilities	(1,593)	(330)
Total Adjustments	5,037	(2,083)
Net Cash Provided by Operating Activities	5,460	8,340
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(16,012)	(10,757)
Proceeds from sale of property, plant, and equipment	0	4
Net Cash Used in Investing Activities	(16,012)	(10,753)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from issuance of notes payable	25,000	0
Payments of debt issuance costs	(114)	0
Dividends paid	(5,573)	(5,399)
Purchase of treasury stock	(10,506)	(2,925)
Net Cash Provided by (Used in) Financing Activities	8,807	(8,324)
Effect of exchange rate changes on Cash and Cash Equivalents	(21)	165
Net Decrease in Cash and Cash Equivalents	(1,766)	(10,572)
Cash and Cash Equivalents, Beginning of Period	24,591	40,890
Cash and Cash Equivalents, End of Period	22,825	30,318
Supplemental disclosure of non-cash investing and financing activities:
Interest payments, net of amounts capitalized	178	198
Income tax payments	219	1,482
Capital expenditures accrued, but not paid	1,071	751
Cash dividends declared and accrued, but not paid	$ 1,845	$ 1,795