CAPITAL STOCK (Details 8)	12 Months Ended
	Jul. 31, 2018 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Ending balance | shares	14,911,625
Options Outstanding, Weighted Average Exercise Price, Ending balance	$ 1.41
Options Outstanding, Weighted Average Remaining Contractual Term (Years)	2 years 6 months 4 days
Options Exercisable, Ending balance | shares	11,432,125
Options Exercisable, Weighted Average Exercise Price, Ending balance	$ 1.41
Options Exercisable, Weighted Average Remaining Contractual Term (Years)	1 year 10 months 13 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	$ 0.99
Options Outstanding, Ending balance | shares	1,860,500
Options Outstanding, Weighted Average Exercise Price, Ending balance	$ 0.93
Options Outstanding, Weighted Average Remaining Contractual Term (Years)	2 years 10 months 13 days
Options Exercisable, Ending balance | shares	1,860,500
Options Exercisable, Weighted Average Exercise Price, Ending balance	$ 0.93
Options Exercisable, Weighted Average Remaining Contractual Term (Years)	2 years 10 months 13 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	$ 1.00
Exercise Price Range, Upper Range Limit	$ 1.65
Options Outstanding, Ending balance | shares	11,778,625
Options Outstanding, Weighted Average Exercise Price, Ending balance	$ 1.33
Options Outstanding, Weighted Average Remaining Contractual Term (Years)	2 years 5 months 19 days
Options Exercisable, Ending balance | shares	8,299,125
Options Exercisable, Weighted Average Exercise Price, Ending balance	$ 1.28
Options Exercisable, Weighted Average Remaining Contractual Term (Years)	1 year 6 months 25 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	$ 1.66
Exercise Price Range, Upper Range Limit	$ 3.86
Options Outstanding, Ending balance | shares	1,272,500
Options Outstanding, Weighted Average Exercise Price, Ending balance	$ 2.89
Options Outstanding, Weighted Average Remaining Contractual Term (Years)	2 years 3 months 29 days
Options Exercisable, Ending balance | shares	1,272,500
Options Exercisable, Weighted Average Exercise Price, Ending balance	$ 2.89
Options Exercisable, Weighted Average Remaining Contractual Term (Years)	2 years 3 months 29 days