CAPITAL STOCK (Details 4) - $ / shares	12 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2015
Class of Warrant or Right [Line Items]
Weighted Average Exercise Price	$ 1.97
Number of Warrants Outstanding	30,923,489	19,676,560	13,953,872	7,859,524
Weighted Average Remaining Contractual Life (Years)	2 years 1 month 28 days
Warrant [Member]
Class of Warrant or Right [Line Items]
Weighted Average Exercise Price	$ 1.20
Number of Warrants Outstanding	4,542,832
Expiry Date	Mar. 10, 2019
Weighted Average Remaining Contractual Life (Years)	7 months 10 days
Warrants 1 [Member]
Class of Warrant or Right [Line Items]
Weighted Average Exercise Price	$ 1.35
Number of Warrants Outstanding	2,600,000
Expiry Date	Jan. 30, 2020
Weighted Average Remaining Contractual Life (Years)	1 year 6 months
Warrants 2 [Member]
Class of Warrant or Right [Line Items]
Weighted Average Exercise Price	$ 1.64
Number of Warrants Outstanding	50,000
Expiry Date	May 21, 2023
Weighted Average Remaining Contractual Life (Years)	4 years 9 months 18 days
Warrants 3 [Member]
Class of Warrant or Right [Line Items]
Weighted Average Exercise Price	$ 2.00
Number of Warrants Outstanding	9,571,929
Expiry Date	Jan. 20, 2020
Weighted Average Remaining Contractual Life (Years)	1 year 5 months 19 days
Warrants 4 [Member]
Class of Warrant or Right [Line Items]
Weighted Average Exercise Price	$ 2.30
Number of Warrants Outstanding	11,308,728
Expiry Date	Aug. 09, 2022
Weighted Average Remaining Contractual Life (Years)	4 years 7 days
Warrants 5 [Member]
Class of Warrant or Right [Line Items]
Weighted Average Exercise Price	$ 2.35
Number of Warrants Outstanding	2,850,000
Expiry Date	Sep. 24, 2018
Weighted Average Remaining Contractual Life (Years)	1 month 24 days