CAPITAL STOCK (Details 3) - $ / shares	12 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2016
Number of Warrants, Beginning Balance	19,676,560	13,953,872	7,859,524
Number of Warrants, Issued	11,358,728	9,571,929	6,594,348
Number of Warrants, Exercised	(61,799)	(1,989,717)
Number of Warrants, Expired	(50,000)	(1,859,524)	(500,000)
Number of Warrants, Ending Balance	30,923,489	19,676,560	13,953,872
Weighted Average Exercise Price, Beginning Balance	$ 1.78	$ 1.65	$ 2.38
Weighted Average Exercise Price, Issued	2.30	2.00	1.20
Weighted Average Exercise Price, Exercised	1.20	1.20
Weighted Average Exercise Price, Expired	1.95	2.60	1.00
Weighted Average Exercise Price, Ending Balance	$ 1.97	$ 1.78	$ 1.65