INCOME TAXES (Details 1) - USD ($)	12 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2015
Loss before income taxes	$ (18,005,411)	$ (17,362,111)	$ (23,397,341)
Corporate tax rate	35.43%	35.35%	35.32%
Expected tax recovery	$ (6,379,317)	$ (6,137,506)	$ (8,263,941)
Foreign tax rate differences	185,700	230,148	223,980
Permanent differences	446,377	806,736	1,473,225
Prior year true-up	(804,822)	(647,307)	50,025
State tax rate true-up	(223,770)	(105,843)	(205,285)
Property acquisition	(491,798)	0	0
Foreign exchange rate differences	(3,248)	129,015	144,242
Other	81,660	59,705	62,398
Change in valuation allowance	7,149,654	5,627,606	6,474,775
Tax adjustment from operations	(39,564)	(37,446)	(40,581)
Unrealized loss, other comprehensive loss	5,209	5,207	5,168
Deferred income tax benefit	$ (34,355)	$ (32,239)	$ (35,413)