Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - 6 months ended Jan. 31, 2019 - 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	1,464,000		1,497,000
Issuance of common stock in private placements, net, shares	3,333,964
Share-based compensation expense - stock options		1,247,000		1,247,000
Share-based compensation expense - restricted stock units		954,000		954,000
Issuance of common stock for vested restricted stock units	$ 1,000	(1,000)
Issuance of common stock for vested restricted stock units, shares	131,250
Net loss			(3,862,000)	(3,862,000)
Balance at Jan. 31, 2019	$ 717,000	$ 121,186,000	$ (120,786,000)	$ 1,117,000
Balance, shares at Jan. 31, 2019	71,713,372