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, 2020	$ 871,000	$ 127,414,000	$ (123,474,000)	$ 4,811,000
Balance, shares at Jul. 31, 2020	87,072,951
Share-based compensation expense - stock options		208,000		208,000
Share-based compensation expense - restricted stock units		21,000		21,000
Net loss			(180,000)	(180,000)
Ending balance, value at Oct. 31, 2020	$ 871,000	127,643,000	(123,654,000)	4,860,000
Balance, shares at Oct. 31, 2020	87,072,951
Beginning balance, value at Jul. 31, 2021	$ 873,000	128,253,000	(125,793,000)	3,333,000
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
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
Net loss			(796,000)	(796,000)
Ending balance, value at Oct. 31, 2021	$ 879,000	$ 128,437,000	$ (126,589,000)	$ 2,727,000
Balance, shares at Oct. 31, 2021	87,873,141