CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income [Member]	Total
Beginning Balance at Jul. 31, 2013	$ 86,036	$ 200,046,081	$ (142,687,039)		$ 57,445,078
Beginning Balance (Shares) at Jul. 31, 2013	86,032,285
Common stock issued for equity financing	3,381	5,905,670			5,909,051
Common stock issued for equity financing (Shares)	3,380,954
Common stock issued for debt financing	100	174,247			174,347
Common stock issued for debt financing (Shares)	100,000
Common stock issued for exercise of stock options	456	22,045			22,501
Common stock issued for exercise of stock options (Shares)	455,645
Common stock issued for advance royalty payment	30	34,820			34,850
Common stock issued for advance royalty payment (Shares)	30,304
Common stock issued for bonuses	30	54,970			55,000
Common stock issued for bonuses (Shares)	30,386
Common stock issued for consulting services	439	773,119			773,558
Common stock issued for consulting services (Shares)	438,190
Options issued for consulting services		64,529			64,529
Options issued for employees benefits		94,591			94,591
Warrants issued for equity financing		580,525			580,525
Amendment of debt related instruments		(617,510)			(617,510)
Net loss for the period			(19,755,935)		(19,755,935)
Other comprehensive loss				(13,555)	(13,555)
Ending Balance at Apr. 30, 2014	$ 90,472	$ 207,133,087	$ (162,442,974)	$ (13,555)	$ 44,767,030
Ending Balance (Shares) at Apr. 30, 2014	90,467,764