INCOME TAXES (Details 2)	12 Months Ended
	May 31, 2016 CAD
Tax Year 2029 [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2029
Tax Year 2030 [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2030
Tax Year 2031 [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2031
Tax Year 2032 [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2032
Tax Year 2033 [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2033
Tax Year 2034 [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2034
Tax Year 2035 [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2035
Tax Year 2036 [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2036
CANADA
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Amount	CAD 7,804,000
CANADA | Tax Year 2029 [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Amount	0
CANADA | Tax Year 2030 [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Amount	0
CANADA | Tax Year 2031 [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Amount	379,000
CANADA | Tax Year 2032 [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Amount	1,089,000
CANADA | Tax Year 2033 [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Amount	1,443,000
CANADA | Tax Year 2034 [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Amount	1,733,000
CANADA | Tax Year 2035 [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Amount	1,806,000
CANADA | Tax Year 2036 [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Amount	1,354,000
UNITED STATES
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Amount	13,004,000
UNITED STATES | Tax Year 2029 [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Amount	1,253,000
UNITED STATES | Tax Year 2030 [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Amount	2,000
UNITED STATES | Tax Year 2031 [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Amount	186,000
UNITED STATES | Tax Year 2032 [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Amount	1,595,000
UNITED STATES | Tax Year 2033 [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Amount	2,106,000
UNITED STATES | Tax Year 2034 [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Amount	4,102,000
UNITED STATES | Tax Year 2035 [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Amount	1,906,000
UNITED STATES | Tax Year 2036 [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Amount	CAD 1,854,000