Consolidated Statements of Stockholders' Equity - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Beginning balance, value at Jul. 31, 2020	$ 871,000	$ 127,414,000	$ (123,474,000)	$ 4,811,000
Beginning balance, shares at Jul. 31, 2020	87,072,951
Share-based compensation expense - stock options		758,000		758,000
Share-based compensation expense - restricted stock units		83,000		83,000
Issuance of common stock upon the exercise of stock options	$ 2,000	(2,000)
Issuance of common stock upon the exercise of stock options, shares	150,190
Net loss			(2,319,000)	(2,319,000)
Ending balance, value at Jul. 31, 2021	$ 873,000	128,253,000	(125,793,000)	3,333,000
Ending balance, shares at Jul. 31, 2021	87,223,141
Share-based compensation expense - stock options		465,000		465,000
Share-based compensation expense - restricted stock units		102,000		102,000
Net loss			(3,491,000)	(3,491,000)
Issuance of common stock in private placements to related parties, net	$ 233,000	3,267,000		3,500,000
Issuance of common stock in private placements to related parties, net, shares	23,333,332
Issuance of common stock for vested restricted stock units	$ 8,000	(8,000)
Issuance of common stock for vested restricted stock units, shares	800,000
Ending balance, value at Jul. 31, 2022	$ 1,114,000	$ 132,079,000	$ (129,284,000)	$ 3,909,000
Ending balance, shares at Jul. 31, 2022	111,356,473