Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($)	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Total
Balance at Jul. 31, 2018	$ 683,000	$ 117,522,000	$ (116,924,000)	$ 1,281,000
Balance, shares at Jul. 31, 2018	68,248,158
Issuance of common stock in private placements, net	$ 33,000	1,465,000		1,498,000
Issuance of common stock in private placements, net, shares	3,333,964
Share-based compensation expense - stock options		1,002,000		1,002,000
Share-based compensation expense - restricted stock units		741,000		741,000
Net loss			(2,566,000)	(2,566,000)
Balance at Oct. 31, 2018	$ 716,000	120,730,000	(119,490,000)	1,956,000
Balance, shares at Oct. 31, 2018	71,582,122
Balance at Jul. 31, 2019	$ 768,000	123,900,000	(123,478,000)	1,190,000
Balance, shares at Jul. 31, 2019	76,732,334
Issuance of common stock in private placements, net	$ 28,000	802,000		830,000
Issuance of common stock in private placements, net, shares	2,862,068
Share-based compensation expense - stock options		268,000		268,000
Share-based compensation expense - restricted stock units		190,000		190,000
Issuance of common stock for vested restricted stock units	$ 4,000	(4,000)
Issuance of common stock for vested restricted stock units, shares	400,000
Net loss			(1,125,000)	(1,125,000)
Balance at Oct. 31, 2019	$ 800,000	$ 125,156,000	$ (124,603,000)	$ 1,353,000
Balance, shares at Oct. 31, 2019	79,994,402