Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2025	Apr. 30, 2024
Total revenue	$ 491,000	$ 441,000	$ 1,438,000	$ 1,489,000
Cost of goods sold	208,000	183,000	603,000	612,000
Gross profit	283,000	258,000	835,000	877,000
Operating costs and expenses
Selling, general and administrative	776,000	998,000	2,528,000	3,136,000
Research and development	91,000	77,000	243,000	233,000
Total operating costs and expenses	867,000	1,075,000	2,771,000	3,369,000
Loss from operations	(584,000)	(817,000)	(1,936,000)	(2,492,000)
Other income (expense)
Other income (expense), net	82,000	1,000	79,000	1,000
Interest expense, net	(78,000)	(41,000)	(210,000)	(103,000)
Total other income (expense)	4,000	(40,000)	(131,000)	(102,000)
Net loss	$ (580,000)	$ (857,000)	$ (2,067,000)	$ (2,594,000)
Basic net loss per share	$ (0.01)	$ (0.01)	$ (0.02)	$ (0.03)
Diluted net loss per share	$ (0.01)	$ (0.01)	$ (0.02)	$ (0.03)
Shares used in computing basic net loss per share	111,856,473	111,856,473	111,856,473	111,856,473
Shares used in computing diluted net loss per share	111,856,473	111,856,473	111,856,473	111,856,473
Product [Member]
Total revenue	$ 489,000	$ 440,000	$ 1,435,000	$ 1,483,000
Royalty [Member]
Total revenue	$ 2,000	$ 1,000	$ 3,000	$ 6,000