CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
Balance at Jul. 31, 2013	$ 57,445,078	$ 86,036	$ 200,046,081	$ (142,687,039)	$ 0
Balance (in shares) at Jul. 31, 2013		86,032,285
Common stock Issued for equity financing, net of issuance costs	5,947,792	$ 3,381	5,944,411	0	0
Common stock Issued for equity financing, net of issuance costs (in shares)		3,380,954
Common stock Issued for exercise of stock options	27,401	$ 471	26,930	0	0
Common stock Issued for exercise of stock options (in shares)		470,492
Common stock Issued for credit facility	676,058	$ 388	675,670	0	0
Common stock Issued for credit facility (in shares)		386,834
Common stock Issued for asset acquisition	34,850	$ 30	34,820	0	0
Common stock Issued for asset acquisition (in shares)		30,304
Stock-based compensation Common stock issued for consulting services	1,101,932	$ 636	1,101,296	0	0
Stock-based compensation Common stock issued for consulting services (in shares)		635,303
Common Stock issued for bonuses/under 2016 Plan	55,000	$ 30	54,970	0	0
Common Stock issued for bonuses/under 2016 Plan (in shares)		30,386
Stock-based compensation Stock options issued to consultants	74,992	$ 0	74,992	0	0
Stock-based compensation Stock options issued to employees	82,321	0	82,321	0	0
Warrants Issued For Equity Financing	584,331	0	584,331	0	0
Amendment Of Debt Related Instruments	(617,510)	0	(617,510)	0	0
Net loss for the year	(25,975,107)	0	0	(25,975,107)	0
Other comprehensive loss	(13,539)	0	0	0	(13,539)
Balance at Jul. 31, 2014	39,423,599	$ 90,972	208,008,312	(168,662,146)	(13,539)
Balance (in shares) at Jul. 31, 2014		90,966,558
Common stock Issued for equity financing, net of issuance costs	7,659,139	$ 5,280	7,653,859	0	0
Common stock Issued for equity financing, net of issuance costs (in shares)		5,280,045
Common stock Issued for exercise of stock options	24,550	$ 305	24,245	0	0
Common stock Issued for exercise of stock options (in shares)		304,657
Stock-based compensation Common stock issued for consulting services	1,851,074	$ 1,111	1,849,963	0	0
Stock-based compensation Common stock issued for consulting services (in shares)		1,108,390
Common stock issued for bonuses	235,490	$ 173	235,317	0	0
Common stock issued for bonuses (Shares)		174,437
Stock-based compensation Stock options issued to consultants	588,207	$ 0	588,207	0	0
Stock-based compensation Stock options issued to management	1,617,937	0	1,617,937	0	0
Stock-based compensation Stock options issued to employees	1,325,040	0	1,325,040	0	0
Warrants Issued For Equity Financing	1,418,116	0	1,418,116	0	0
Issued for equity financing as share issuance costs	206,533	0	206,533	0	0
Net loss for the year	(23,361,928)	0	0	(23,361,928)	0
Other comprehensive loss	(1,092)	0	0	0	(1,092)
Balance at Jul. 31, 2015	30,986,665	$ 97,841	222,927,529	(192,024,074)	(14,631)
Balance (in shares) at Jul. 31, 2015		97,834,087
Common stock Issued for equity financing, net of issuance costs	8,365,037	$ 12,365	8,352,672	0	0
Common stock Issued for equity financing, net of issuance costs (in shares)		12,364,704
Common stock Issued for exercise of stock options	225,115	$ 682	224,433	0	0
Common stock Issued for exercise of stock options (in shares)		682,167
Common stock Issued for credit facility	1,700,000	$ 1,712	1,698,288	0	0
Common stock Issued for credit facility (in shares)		1,711,933
Common stock Issued for asset acquisition	1,226,875	$ 1,334	1,225,541	0	0
Common stock Issued for asset acquisition (in shares)		1,333,560
Common stock Issued for settlement of current liabilities	453,444	$ 487	452,957	0	0
Common stock Issued for settlement of current liabilities (in shares)		487,574
Stock-based compensation Common stock issued for consulting services	1,372,381	$ 1,429	1,370,952	0	0
Stock-based compensation Common stock issued for consulting services (in shares)		1,429,650
Common Stock issued for bonuses/under 2016 Plan	726,244	$ 820	725,424	0	0
Common Stock issued for bonuses/under 2016 Plan (in shares)		826,782
Stock-based compensation Stock options issued to consultants	78,014	$ 0	78,014	0	0
Stock-based compensation Stock options issued to management	735,991	0	735,991	0	0
Stock-based compensation Stock options issued to employees	171,533	0	171,533	0	0
Warrants Issued For Equity Financing	1,619,480	0	1,619,480	0	0
Stock-based compensation Warrants extension for mineral property	14,155	0	14,155	0	0
Warrants extension for credit facility	104,915	0	104,915	0	0
Net loss for the year	(17,329,872)	0	0	(17,329,872)	0
Other comprehensive loss	(99)	0	0	0	(99)
Balance at Jul. 31, 2016	$ 30,449,878	$ 116,670	$ 239,701,884	$ (209,353,946)	$ (14,730)
Balance (in shares) at Jul. 31, 2016		116,670,457