Consolidated Statements Of Stockholders' Equity (Deficit) - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Total
Beginning Balance at Jul. 31, 2013	$ 126,000	$ 69,054,000	$ (70,171,000)	$ (991,000)
Beginning Balance, Shares at Jul. 31, 2013	12,569,503
Issuance of common stock in a private placement, net	$ 123,000	6,494,000		6,617,000
Issuance of common stock in a private placement, net, shares	12,082,194
Shares issued in connection with financings	$ 4,000	(4,000)
Shares issued in connection with financings, shares	415,643
Share-based compensation expense - stock options		80,000		80,000
Share-based compensation expense - restricted stock units		2,878,000		2,878,000
Shares issued in connection with severance agreements	$ 11,000	814,000		825,000
Shares issued in connection with severance agreements, shares	1,165,000
Stock issued to investors to amend subscription agreements	$ 2,000	283,000		285,000
Stock issued to investors to amend subscription agreements, shares	218,938
Stock issued for services		25,000		$ 25,000
Stock issued for services, shares	20,000			2,033,643
Issuance of common stock for consulting agreements	$ 11,000	759,000		$ 770,000
Issuance of common stock for consulting agreements, shares	1,100,000
Issuance of common stock for the cashless exercise of warrants	$ 1,000	(1,000)
Issuance of common stock for the cashless exercise of warrants, shares	100,662
Settlement of warrant liability		97,000		97,000
Issuance of common stock upon vesting of restricted stock units	$ 12,000	(12,000)
Issuance of common stock upon vesting of restricted stock units, shares	1,205,000
Issuance of penalty warrants		23,000		23,000
Warrants issued for services provided		121,000		121,000
Issuance of common stock upon exercise of warrants	$ 5,000	332,000		337,000
Issuance of common stock upon exercise of warrants, shares	518,000
Net loss			(11,050,000)	(11,050,000)
Ending Balance at Jul. 31, 2014	$ 295,000	80,943,000	(81,221,000)	17,000
Ending Balance, Shares at Jul. 31, 2014	29,394,940
Issuance of common stock in a private placement, net	$ 101,000	7,300,000		7,401,000
Issuance of common stock in a private placement, net, shares	10,086,025
Share-based compensation expense - stock options		63,000		63,000
Share-based compensation expense - restricted stock units		2,319,000		2,319,000
Stock issued for services	$ 3,000	203,000		206,000
Stock issued for services, shares	250,000
Issuance of common stock upon vesting of restricted stock units	$ 17,000	(17,000)
Issuance of common stock upon vesting of restricted stock units, shares	1,715,000
Issuance of common stock upon exercise of warrants	$ 4,000			4,000
Issuance of common stock upon exercise of warrants, shares	413,332
Net loss			(7,627,000)	(7,627,000)
Ending Balance at Jul. 31, 2015	$ 420,000	$ 90,811,000	$ (88,848,000)	$ 2,383,000
Ending Balance, Shares at Jul. 31, 2015	41,859,297