CAPITAL STOCK (Details 6)	9 Months Ended
	Apr. 30, 2016 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Ending balance as at April 30, 2016 | shares	11,045,358
Options Outstanding, Weighted Average Exercise Price, Ending balance as at April 30, 2016	$ 1.41
Options Outstanding, Weighted Average Remaining Contractual Term (Years)	3 years 4 months 10 days
Options Exercisable, Ending balance as at April 30, 2016 | shares	10,262,858
Options Exercisable, Weighted Average Exercise Price, Ending balance as at April 30, 2016	$ 1.44
Options Exercisable, Weighted Average Remaining Contractual Term (Years)	3 years 3 months 7 days
Exercise Price Range One [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	$ 0.45
Exercise Price Range, Upper Range Limit	$ 0.96
Options Outstanding, Ending balance as at April 30, 2016 | shares	1,269,634
Options Outstanding, Weighted Average Exercise Price, Ending balance as at April 30, 2016	$ 0.47
Options Outstanding, Weighted Average Remaining Contractual Term (Years)	1 year 6 months 22 days
Options Exercisable, Ending balance as at April 30, 2016 | shares	1,269,634
Options Exercisable, Weighted Average Exercise Price, Ending balance as at April 30, 2016	$ 0.47
Options Exercisable, Weighted Average Remaining Contractual Term (Years)	1 year 6 months 22 days
Exercise Price Range Two [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	$ 0.97
Exercise Price Range, Upper Range Limit	$ 2.45
Options Outstanding, Ending balance as at April 30, 2016 | shares	8,840,000
Options Outstanding, Weighted Average Exercise Price, Ending balance as at April 30, 2016	$ 1.35
Options Outstanding, Weighted Average Remaining Contractual Term (Years)	3 years 6 months 14 days
Options Exercisable, Ending balance as at April 30, 2016 | shares	8,057,500
Options Exercisable, Weighted Average Exercise Price, Ending balance as at April 30, 2016	$ 1.37
Options Exercisable, Weighted Average Remaining Contractual Term (Years)	3 years 5 months 8 days
Exercise Price Range Three [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	$ 2.46
Exercise Price Range, Upper Range Limit	$ 5.70
Options Outstanding, Ending balance as at April 30, 2016 | shares	935,724
Options Outstanding, Weighted Average Exercise Price, Ending balance as at April 30, 2016	$ 3.29
Options Outstanding, Weighted Average Remaining Contractual Term (Years)	4 years 1 month 2 days
Options Exercisable, Ending balance as at April 30, 2016 | shares	935,724
Options Exercisable, Weighted Average Exercise Price, Ending balance as at April 30, 2016	$ 3.29
Options Exercisable, Weighted Average Remaining Contractual Term (Years)	4 years 1 month 2 days