CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)	Common Stock [Member]	Additional Paid-In Capital [Member]	Share Issuance Obligation [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income [Member]	Total
Beginning Balance at Jul. 31, 2012	$ 84,975	$ 196,486,881	$ 194,700	$ (120,823,948)	$ (22,127)	$ 75,920,481
Beginning Balance (Shares) at Jul. 31, 2012	84,975,155
Common stock issued for exercise of stock options and warrants	452	43,112				43,564
Common stock issued for exercise of stock options and warrants (Shares)	451,104
Common stock issued for Yuty Settlement Agreement	76	190,424				190,500
Common stock issued for Yuty Settlement Agreement (Shares)	75,000
Options issued for consulting services		258,109				258,109
Options issued for wages and benefits		361,018				361,018
Net loss for the period				(16,785,878)		(16,785,878)
Unrealized loss on available-for-sale securities					(4,393)	(4,393)
Ending Balance at Apr. 30, 2013	$ 85,503	$ 197,339,544	$ 194,700	$ (137,609,826)	$ (26,520)	$ 59,983,401
Ending Balance (Shares) at Apr. 30, 2013	85,501,259