CONCENTRATIONS OF CREDIT RISK (Details )	3 Months Ended		9 Months Ended		12 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2017	Feb. 29, 2016	May 31, 2016
Net Sales [Member]
Concentration risk, percentage	88.00%	90.00%	87.00%	69.00%
Net Sales [Member] | Customer 1 [Member]
Concentration risk, percentage	88.00%	42.00%	22.00%	36.00%
Net Sales [Member] | Customer 2 [Member]
Concentration risk, percentage		29.00%	46.00%	20.00%
Net Sales [Member] | Customer 3 [Member]
Concentration risk, percentage		19.00%	19.00%	13.00%
Accounts Receivable [Member]
Concentration risk, percentage			100.00%
Accounts Receivable [Member] | Customer 1 [Member]
Concentration risk, percentage			94.00%		83.00%
Accounts Receivable [Member] | Customer 2 [Member]
Concentration risk, percentage			6.00%		11.00%