INCOME TAXES (Details 3) - USD ($)	Jul. 31, 2017	Jul. 31, 2016
Deferred tax assets (liabilities)
Mineral property acquisitions	$ 2,533,819	$ 1,917,796
Exploration costs	10,950,241	10,648,043
Stock option expense	7,031,732	7,081,853
Depreciable property	(367,164)	(66,912)
Inventories	(5,471,486)	(3,632,178)
Asset retirement obligations	(130,740)	(220,209)
Other	179,518	271,468
Loss carry forward	57,989,069	49,565,476
Deferred Tax Assets, Gross	72,714,989	65,565,337
Valuation allowance	(72,720,198)	(65,570,544)
Deferred tax assets	(5,209)	(5,207)
Deferred tax assets, other comprehensive loss	5,209	5,207
Deferred tax liabilities
Mineral property acquisition	(609,470)	(643,825)
Net deferred tax liabilities	$ (609,470)	$ (643,825)