Condensed Consolidated Balance Sheets - USD ($)	Jan. 31, 2024	Jul. 31, 2023
Current assets
Cash and cash equivalents	$ 557,000	$ 1,095,000
Accounts receivable	171,000	285,000
Inventories, net	74,000	88,000
Restricted cash	75,000	75,000
Prepaid expenses	62,000	61,000
Total current assets	939,000	1,604,000
Property, plant and equipment, net	147,000	221,000
Total assets	1,086,000	1,825,000
Current liabilities
Accounts payable	409,000	422,000
Accrued liabilities	136,000	110,000
Total current liabilities	545,000	532,000
Long-term liabilities
Total long-term liabilities	1,862,000	1,021,000
Total liabilities	2,407,000	1,553,000
Commitments and contingencies
Stockholders’ equity (deficiency)
Preferred stock, $0.01 par value: 5,000,000 shares authorized, no shares issued and outstanding
Common stock, $0.01 par value: 150,000,000 shares authorized, 111,856,473 shares issued and outstanding at January 31, 2024, and July 31, 2023	1,119,000	1,119,000
Additional paid-in capital	132,542,000	132,398,000
Accumulated deficit	(134,982,000)	(133,245,000)
Total stockholders’ equity (deficiency)	(1,321,000)	272,000
Total liabilities and stockholders’ equity (deficiency)	1,086,000	1,825,000
Related Party [Member]
Long-term liabilities
Note payable to related parties	$ 1,862,000	$ 1,021,000