SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Narrative (Details) - USD ($)	12 Months Ended
	Jul. 31, 2023	Jul. 31, 2022
Maximum maturity of cash equivalents	3 months	3 months
Inventory obsolescence reserves	$ 800,000	$ 800,000
Spare Parts Reserve, Inventory	2,900,000	2,700,000
Amortization of intangibles	300,000	500,000
Indefinite-lived trademarks	400,000	400,000
Goodwill impairment	0	5,644,000
Stripping costs	4,000,000	2,700,000
Pre-production overburden removal costs	100,000	1,300,000
Pre-production development costs	4,300,000
Land	13,600,000	13,600,000
Mineral rights	2,200,000	2,200,000
Prepaid royalties	2,000,000	2,000,000
Estimated net reclamation asset	2,200,000	1,800,000
Estimated reclamation liability	4,500,000	3,800,000
Depreciation	15,300,000	13,000,000
Interest Costs Capitalized	0	0
Impairment of property, plant and equipment	900,000	0
Capital Parts Reserve	2,000,000	1,800,000
Georgia Landfill Modification Reserve	2,469,000	0
Advertising expense	7,400,000	4,000,000
Shipping and Handling Costs	57,400,000	48,500,000
Research and development costs	$ 1,200,000	2,100,000
Common Stock
Dividend Distribution Percentage	133.33%
Dividend Distribution Percentage Increase	33.33%
Common Stock, Voting Rights	one
Class B
Common Stock, Voting Rights	ten
Retail and Wholesale Products
Goodwill impairment		5,600,000
Business to Business Products
Goodwill impairment		$ 0
Minimum
Amortization period of intangible assets (years)	10 years
Maximum
Amortization period of intangible assets (years)	20 years