CAPITAL STOCK (Details 7)	12 Months Ended
	Jul. 31, 2017 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Ending balance | shares	12,260,500
Options Outstanding, Weighted Average Exercise Price, Ending balance	$ 1.33
Options Exercisable, Ending balance | shares	11,494,750
Options Exercisable, Weighted Average Exercise Price, Ending balance	$ 1.35
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	2,980,500
Options Outstanding, Weighted Average Exercise Price, Ending balance	$ 0.79
Options Exercisable, Ending balance | shares	2,484,750
Options Exercisable, Weighted Average Exercise Price, Ending balance	$ 0.76
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	$ 1.99
Options Outstanding, Ending balance | shares	8,007,500
Options Outstanding, Weighted Average Exercise Price, Ending balance	$ 1.29
Options Exercisable, Ending balance | shares	7,737,500
Options Exercisable, Weighted Average Exercise Price, Ending balance	$ 1.29
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	2.00
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 Exercisable, Ending balance | shares	1,272,500
Options Exercisable, Weighted Average Exercise Price, Ending balance	$ 2.89