CAPITAL STOCK (Details 6) - $ / shares	12 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2016
Share Based Compensation Stock Options Activity [Line Items]
Number of Stock Options, Exercised			0
Employee Stock Option [Member]
Share Based Compensation Stock Options Activity [Line Items]
Number of Stock Options, Begining Balance	12,260,500	12,105,858	10,581,975
Number of Stock Options, Granted	4,083,000	672,500	3,033,000
Number of Stock Options, Exercised	(1,365,625)	(412,134)	(682,167)
Number of Stock Options, Expired		(100,724)	(1,950)
Number of Stock Options, Forfeited	(66,250)	(5,000)	(825,000)
Number of Stock Options, Ending Balance	14,911,625	12,260,500	12,105,858
Weighted Average Exercise Price, Begining Balance	$ 1.33	$ 1.34	$ 1.38
Weighted Average Exercise Price, Granted	1.40	1.11	1.02
Weighted Average Exercise Price, Exercised	0.70	0.56	0.33
Weighted Average Exercise Price, Expired		4.35	5.90
Weighted Average Exercise Price, Forfeited	1.24	0.93	1.48
Weighted Average Exercise Price, Ending Balance	$ 1.41	$ 1.33	$ 1.34