Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2024	Jan. 31, 2023
Operating activities
Net loss	$ (1,002,000)	$ (1,060,000)	$ (1,737,000)	$ (2,053,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Share-based compensation			144,000	211,000
Depreciation and amortization			74,000	67,000
Gain on extinguishment of indebtedness
Changes in operating assets and liabilities:
Accounts receivable			114,000	45,000
Inventories			14,000	(21,000)
Prepaid expenses			(1,000)	(6,000)
Interest on note payable			56,000
Accounts payable and accrued liabilities			13,000	(112,000)
Net cash used in operating activities			(1,323,000)	(1,869,000)
Investing activities
Purchases of property, plant and equipment				(37,000)
Net cash used in investing activities				(37,000)
Financing activities
Net proceeds from note payable to related parties			785,000
Net cash provided by financing activities			785,000
Net decrease in cash, cash equivalents, and restricted cash			(538,000)	(1,906,000)
Cash, cash equivalents, and restricted cash at beginning of period			1,170,000	3,466,000
Cash, cash equivalents, and restricted cash at end of period	632,000	1,560,000	632,000	1,560,000
Reconciliation of cash, cash equivalents, and restricted cash to the condensed consolidated balance sheets
Cash and cash equivalents	557,000	1,485,000	557,000	1,485,000
Restricted cash	75,000	75,000	75,000	75,000
Total cash, cash equivalents and restricted cash	$ 632,000	$ 1,560,000	632,000	1,560,000
Supplemental disclosure of cash flow information
Cash paid for taxes				$ 5,000