Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2023
Cash Flows from Operating Activities
Net Income	$ 53,996	$ 39,426	$ 29,483
Adjustments to reconcile net income to net cash provided by operating activites:
Depreciation and amortization	22,042	19,281	15,528
Non-cash stock compensation expense	5,368	4,819	3,147
Loss on pension termination	0	0	4,652
Deferred income tax expense (provision)	240	1,697	(4,431)
Net increase (decrease) to provision for bad debts and cash discounts	559	(153)	284
Loss on impairment of patent applications	49	0	61
Accretion for asset retirement obligation	190	211	161
(Gain) Loss on the disposals of property, plant and equipment	(31)	314	1,044
(Increase) decrease in:
Accounts receivable	(7,789)	1,453	(7,899)
Inventories	2,336	(4,682)	(2,204)
Prepaid expenses	191	(2,431)	1,082
Deferred income taxes	31	(115)	510
Other assets	4,095	3,404	59
Increase (decrease) in:
Accounts payable	926	(2,794)	3,241
Accrued expenses	2,384	2,449	6,455
Deferred compensation	110	1,155	(47)
Other liabilities	(4,514)	(3,721)	(1,362)
Total Adjustments	26,187	20,887	20,281
Net Cash Provided by Operating Activities	80,183	60,313	49,764
Cash Flows from Investing Activities
Capital expenditures	(32,562)	(32,000)	(24,368)
Proceeds from sale of property, plant and equipment	151	182	70
Acquisition of business	(115)	(44,298)	0
Acquisition of equity in Agromex	0	0	(269)
Net Cash Used in Investing Activities	(32,526)	(76,116)	(24,567)
Cash Flows from Financing Activities
Proceeds from issuance of notes payable	0	20,000	0
Principal payments on notes payable	(11,000)	(1,000)	(1,000)
Payment of debt issuance costs	0	(90)	(7)
Dividends paid	(8,395)	(7,806)	(7,433)
Purchase of treasury stock	(2,349)	(2,778)	(1,078)
Net Cash (Used in) Provided by Financing Activities	(21,744)	8,326	(9,518)
Effect of exchange rate changes on cash and cash equivalents	64	204	(223)
Net Increase (Decrease) in Cash and Cash Equivalents	25,977	(7,273)	15,456
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Beginning Balance	24,481	31,754	16,298
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Ending Balance	50,458	24,481	31,754
Reconciliation of cash, cash equivalents and restricted cash
Restricted cash in prepaid expenses and other assets	0	1,000	0
(Decrease) increase to restricted cash	(885)	1,000	0
Final settlement of acquisition of Ultra Pet		0	0
Other cash flows:
Interest payments, net of amounts capitalized	1,697	1,089	1,135
Income tax payments	12,598	10,006	7,367
Change in capital expenditures in accounts payable	876	458	326
Change in capital expenditures in accrued expenses	(1,553)	3,380	357
Noncash investing and financing activities:
Cash dividends declared and accrued, but not paid	2,444	2,096	1,927
Increase in reclamation asset and liability	$ 926	$ 79	$ 522