CAPITAL STOCK (Details 7)	9 Months Ended
	Apr. 30, 2017 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Ending balance | shares	12,255,500
Options Outstanding, Weighted Average Exercise Price, Ending balance	$ 1.33
Options Exercisable, Ending balance | shares	11,005,250
Options Exercisable, Weighted Average Exercise Price, Ending balance	$ 1.37
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 | shares	2,708,000
Options Outstanding, Weighted Average Exercise Price, Ending balance	$ 0.77
Options Exercisable, Ending balance | shares	1,802,750
Options Exercisable, Weighted Average Exercise Price, Ending balance	$ 0.69
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 | shares	8,762,500
Options Outstanding, Weighted Average Exercise Price, Ending balance	$ 1.34
Options Exercisable, Ending balance | shares	8,417,500
Options Exercisable, Weighted Average Exercise Price, Ending balance	$ 1.35
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 | shares	785,000
Options Outstanding, Weighted Average Exercise Price, Ending balance	$ 3.18
Options Exercisable, Ending balance | shares	785,000
Options Exercisable, Weighted Average Exercise Price, Ending balance	$ 3.18