CAPITAL STOCK (Details 6) - $ / shares	12 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014
Share Based Compensation Stock Options Activity [Line Items]
Number of Stock Options, Granted	672,500	3,033,000	7,640,000
Employee Stock Option [Member]
Share Based Compensation Stock Options Activity [Line Items]
Number of Stock Options, Begining Balance	12,105,858	10,581,975	7,987,214
Number of Stock Options, Granted	672,500	3,033,000	7,640,000
Number of Stock Options, Exercised	(412,134)	(682,167)	(609,390)
Number of Stock Options, Expired	(100,724)	(1,950)	(15,599)
Number of Stock Options, Forfeited	(5,000)	(825,000)	(126,250)
Number of Stock Options, Cancelled			(4,294,000)
Number of Stock Options, Ending Balance	12,260,500	12,105,858	10,581,975	7,987,214
Weighted Average Exercise Price, Begining Balance	$ 1.34	$ 1.38	$ 2.10
Weighted Average Exercise Price, Granted	1.11	1.02	1.32
Weighted Average Exercise Price, Exercised	0.56	0.33	1.16
Weighted Average Exercise Price, Expired	4.35	5.90	5.13
Weighted Average Exercise Price, Forfeited	0.93	1.48	2.52
Weighted Average Exercise Price, Cancelled			2.59
Weighted Average Exercise Price, Ending Balance	$ 1.33	$ 1.34	$ 1.38	$ 2.10
Weighted Average Remaining Contractual Term, Granted	4 years 2 months 26 days	4 years 7 months 24 days	4 years 1 month 6 days
Weighted Average Remaining Contractual Term, Exercised	0 years	4 days	3 years 10 months 13 days
Weighted Average Remaining Contractual Term, Forfeited	0 years	7 days	6 years 2 months 12 days
Weighted Average Remaining Contractual Term, Cancelled			5 years 7 months 2 days
Weighted Average Remaining Contractual Term	2 years 5 months 12 days	3 years 4 months 10 days	3 years 8 months 5 days	4 years 11 months 19 days