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, 2009	$ 56,237	$ 91,686,382		$ (53,903,464)	$ 10,600	$ 37,849,755
Beginning Balance (Shares) at Jul. 31, 2009	56,237,269
Common stock issued for exercise of stock options and warrants	1,152	1,143,603				1,144,755
Common stock issued for exercise of stock options and warrants (Shares)	1,151,852
Common stock issued for consulting service agreements	579	1,616,506				1,617,085
Common stock issued for consulting service agreements (Shares)	578,632
Common stock issued for STMV Acquisition	2,755	9,749,945	194,700			9,947,400
Common stock issued for STMV Acquisition (Shares)	2,755,000
Common stock issued for mineral property acquisition	10	32,170				32,180
Common stock issued for mineral property acquisition (Shares)	10,448
Common stock issued for bonuses	55	201,743				201,798
Common stock issued for bonuses (Shares)	55,136
Warrants issued as penalties pursuant to private placement financing		517,273				517,273
Options issued for consulting services		1,964,006				1,964,006
Options issued for management fees		1,960,000				1,960,000
Options issued for wages and benefits		1,286,506				1,286,506
Unrealized loss on available-for-sale securities					(5,752)	(5,752)
Net loss for the year				(14,478,669)		(14,478,669)
Ending Balance at Jul. 31, 2010	60,788	110,158,134	194,700	(68,382,133)	4,848	42,036,337
Ending Balance (Shares) at Jul. 31, 2010	60,788,337
Common stock issued for exercise of stock options and warrants	4,188	11,447,707				11,451,895
Common stock issued for exercise of stock options and warrants (Shares)	4,187,962
Common stock issued for consulting service agreements	175	754,607				754,782
Common stock issued for consulting service agreements (Shares)	174,725
Common stock issued for mineral property acquisition	225	722,025				722,250
Common stock issued for mineral property acquisition (Shares)	225,000
Common stock issued for private placement financing	8,111	25,646,287				25,654,398
Common stock issued for private placement financing (Shares)	8,111,313
Options issued for consulting services		1,798,833				1,798,833
Options issued for management fees		2,079,707				2,079,707
Options issued for wages and benefits		1,956,906				1,956,906
Unrealized loss on available-for-sale securities					25,778	25,778
Net loss for the year				(27,358,095)		(27,358,095)
Ending Balance at Jul. 31, 2011	73,487	154,564,206	194,700	(95,740,228)	30,626	59,122,791
Ending Balance (Shares) at Jul. 31, 2011	73,487,337
Common stock issued for public financing	6,285	20,962,458				20,968,743
Common stock issued for public financing (Shares)	6,284,770
Common stock issued for exercise of stock options and warrants	305	553,815				554,120
Common stock issued for exercise of stock options and warrants (Shares)	304,323
Common stock issued for consulting service agreements	50	167,324				167,374
Common stock issued for consulting service agreements (Shares)	50,000
Common stock issued for mineral property acquisition	4,521	15,953,311				15,957,832
Common stock issued for mineral property acquisition (Shares)	4,520,669
Common stock issued for settlement of convertible debtentures	128	699,212				699,340
Common stock issued for settlement of convertible debtentures (Shares)	128,508
Common stock issued for database acquisition	159	510,989				511,148
Common stock issued for database acquisition (Shares)	159,236
Common stock issued for settlement of current liabilities	40	158,386				158,426
Common stock issued for settlement of current liabilities (Shares)	40,312
Options issued for consulting services		763,848				763,848
Options issued for management fees		834,219				834,219
Options issued for wages and benefits		1,144,062				1,144,062
Options issued for mineral property acquisition		76,442				76,442
Broker options issued for mineral property acquisition		28,149				28,149
Warrants issued for mineral property acquisition		70,460				70,460
Unrealized loss on available-for-sale securities					(52,753)	(52,753)
Net loss for the year				(25,083,720)		(25,083,720)
Ending Balance at Jul. 31, 2012	$ 84,975	$ 196,486,881	$ 194,700	$ (120,823,948)	$ (22,127)	$ 75,920,481
Ending Balance (Shares) at Jul. 31, 2012	84,975,155