Summary of Revenue by Product (Details) - USD ($)	3 Months Ended	9 Months Ended
Apr. 30, 2026	Apr. 30, 2025	Apr. 30, 2026	Apr. 30, 2025
Product Information [Line Items]
Revenue	$ 506,000	$ 489,000	$ 1,656,000	$ 1,435,000
PURE Hard Surface [Member]
Product Information [Line Items]
Revenue	92,000	468,000	1,550,000	1,242,000
SILVERION [Member]
Product Information [Line Items]
Revenue	$ 414,000	$ 21,000	$ 106,000	$ 193,000

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details