TAX REFORM AND INCOME TAXES (Details 1) - USD ($)	3 Months Ended	12 Months Ended
	Jan. 31, 2018	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2016
Loss before income taxes		$ (18,534,145)	$ (18,005,411)	$ (17,362,111)
Corporate tax rate		27.46%	35.43%	35.35%
Expected tax recovery		$ (5,089,476)	$ (6,379,317)	$ (6,137,506)
Increase (decrease) resulting from
Foreign tax rate differences		167,162	185,700	230,148
Permanent differences		434,863	446,377	806,736
Prior year true-up		(141,814)	(1,028,592)	(753,150)
Property acquisition		0	(491,798)	0
Foreign exchange rate differences		(41,014)	(3,248)	129,015
Other		35,706	81,660	59,705
Recognition of deferred tax assets		430,121	0	0
Change in valuation allowance		4,156,768	7,149,654	5,627,606
Tax adjustment from operations		(47,684)	(39,564)	(37,446)
Re-measurement of deferred tax liability at 21%		(232,843)	0	0
Recognition of deferred tax assets to offset deferred tax liability		(430,121)	0	0
Unrealized loss, other comprehensive loss		3,137	5,209	5,207
Deferred tax benefits	$ (232,843)	$ (707,511)	$ (34,355)	$ (32,239)