Operating Segments Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2026	Jan. 31, 2025
Revenue by Principal Product
Net Sales	$ 117,737	$ 116,914	$ 238,223	$ 244,859
Business to Business Products
Revenue by Principal Product
Net Sales	41,977	43,416	86,263	91,831
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	11,242	9,175	24,173	20,757
Business to Business Products | Fluids Purification
Revenue by Principal Product
Net Sales	25,473	26,512	52,140	57,115
Business to Business Products | Animal Health & Nutrition
Revenue by Principal Product
Net Sales	5,262	7,729	9,950	13,959
Retail and Wholesale Products
Revenue by Principal Product
Net Sales	75,760	73,498	151,960	153,028
Retail and Wholesale Products | Cat Litter
Revenue by Principal Product
Net Sales	65,110	63,237	129,676	130,913
Retail and Wholesale Products | Industrial and Sports
Revenue by Principal Product
Net Sales	10,650	10,261	22,284	22,115
Retail and Wholesale Products | Agricultural and Horticultural
Revenue by Principal Product
Net Sales	0	0	0	0
Retail and Wholesale Products | Fluids Purification
Revenue by Principal Product
Net Sales	0	0	0	0
Retail and Wholesale Products | Animal Health & Nutrition
Revenue by Principal Product
Net Sales	$ 0	$ 0	$ 0	$ 0