Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Beginning balance, value at Jul. 31, 2021	$ 873,000	$ 128,253,000	$ (125,793,000)	$ 3,333,000
Beginning balance, shares at Jul. 31, 2021	87,223,141
Share-based compensation expense - stock options		169,000		169,000
Share-based compensation expense - restricted stock units		21,000		21,000
Net loss			(796,000)	(796,000)
Issuance of common stock upon the vesting of restricted stock units	$ 6,000	(6,000)
Issuance of common stock upon the vesting of restricted stock units, shares	650,000
Ending balance, value at Oct. 31, 2021	$ 879,000	128,437,000	(126,589,000)	2,727,000
Ending balance, shares at Oct. 31, 2021	87,873,141
Beginning balance, value at Jul. 31, 2022	$ 1,114,000	132,079,000	(129,284,000)	3,909,000
Beginning balance, shares at Jul. 31, 2022	111,356,473
Share-based compensation expense - stock options		63,000		63,000
Share-based compensation expense - restricted stock units		21,000		21,000
Net loss			(993,000)	(993,000)
Ending balance, value at Oct. 31, 2022	$ 1,114,000	$ 132,163,000	$ (130,277,000)	$ 3,000,000
Ending balance, shares at Oct. 31, 2022	111,356,473