SHARE CAPITAL (Details 3) - CAD	9 Months Ended
	Feb. 29, 2016	Feb. 28, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	CAD 639,350	CAD 1,145,473
Consulting fees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	317,528	414,066
Exploration expenditures - Geological/geophysical [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	13,809	30,765
Investor relations [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	75,621	164,611
Professional Fees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	13,802	39,458
Wages and benefits [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	CAD 218,590	CAD 496,573