INCOME TAXES Components of Deferred Tax Assets and Liabilities (Details) - USD ($)	Jul. 31, 2022	Jul. 31, 2021
Deferred Tax Asset
Depreciation	$ 0	$ 0
Deferred compensation	1,499,000	1,593,000
Postretirement benefits	209,000	1,296,000
Goodwill	62,000	0
Lease right of use assets	0	0
Lease liabilities	3,040,000	2,524,000
Allowance for doubtful accounts	95,000	176,000
Deferred marketing expenses	0	0
Other assets	1,000	289,000
Other liabilities	0	0
Accrued expenses	2,362,000	2,402,000
Tax credits	223,000	87,000
Amortization	1,046,000	1,028,000
Inventories	366,000	351,000
Depletion	0	0
Stock-based compensation	1,522,000	1,340,000
Reclamation	549,000	498,000
Other liabilities - foreign	0	0
Other assets - foreign	1,761,000	1,362,000
Valuation allowance	(1,761,000)	(1,362,000)
Total deferred tax assets	10,974,000	11,584,000
Deferred Tax Liability
Depreciation	4,356,000	5,870,000
Deferred compensation	0	0
Postretirement benefits	0	0
Goodwill	0	(1,073,000)
Lease right of use assets	2,700,000	2,160,000
Lease liabilities	0	0
Allowance for doubtful accounts	0	0
Deferred marketing expenses	22,000	133,000
Other assets	0	0
Other liabilities	23,000	0
Accrued expenses	0	0
Tax credits	0	0
Amortization	0	0
Inventories	0	0
Depletion	154,000	166,000
Stock-based compensation	0	0
Reclamation	0	0
Other liabilities - foreign	42,000	86,000
Other assets - foreign	0	0
Valuation allowance	0	0
Total deferred tax liabilities	$ 7,297,000	$ 9,488,000