Summary of Revenue by Product (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2024	Jan. 31, 2023
Product Information [Line Items]
Revenue	$ 325,000	$ 396,000	$ 1,043,000	$ 863,000
PURE Hard Surface [Member]
Product Information [Line Items]
Revenue	325,000	332,000	1,036,000	778,000
Sil Verion [Member]
Product Information [Line Items]
Revenue		$ 64,000	$ 7,000	$ 85,000