Operating Segments Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2024	Jan. 31, 2023
Revenue by Principal Product
Net Sales	$ 105,668	$ 101,669	$ 217,106	$ 200,208
Business to Business Products
Revenue by Principal Product
Net Sales	36,234	35,154	75,395	68,841
Business to Business Products | Cat Litter
Revenue by Principal Product
Net Sales	0	0	0	0
Business to Business Products | Industrial and Sports
Revenue by Principal Product
Net Sales	0	0	0	0
Business to Business Products | Agricultural and Horticultural
Revenue by Principal Product
Net Sales	9,278	9,785	19,593	19,788
Business to Business Products | Bleaching Clay and Fluids Purification
Revenue by Principal Product
Net Sales	22,709	19,012	45,115	37,241
Business to Business Products | Animal Health and Nutrition
Revenue by Principal Product
Net Sales	4,247	6,357	10,687	11,812
Retail and Wholesale Products
Revenue by Principal Product
Net Sales	69,434	66,515	141,711	131,367
Retail and Wholesale Products | Cat Litter
Revenue by Principal Product
Net Sales	59,326	56,382	120,187	110,580
Retail and Wholesale Products | Industrial and Sports
Revenue by Principal Product
Net Sales	10,108	10,133	21,524	20,787
Retail and Wholesale Products | Agricultural and Horticultural
Revenue by Principal Product
Net Sales	0	0	0	0
Retail and Wholesale Products | Bleaching Clay and Fluids Purification
Revenue by Principal Product
Net Sales	0	0	0	0
Retail and Wholesale Products | Animal Health and Nutrition
Revenue by Principal Product
Net Sales	$ 0	$ 0	$ 0	$ 0