15. SEGMENT INFORMATION (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	May. 31, 2015	Feb. 28, 2015	Nov. 30, 2014	Aug. 31, 2014	May. 31, 2014	Feb. 28, 2014	Nov. 30, 2013	Aug. 31, 2013	May. 31, 2015	May. 31, 2014	May. 31, 2013
Net Sales	$ 1,818	$ 2,027	$ 2,615	$ 3,558	$ 5,370	$ 5,612	$ 4,950	$ 3,752	$ 10,018	$ 19,684	$ 16,488
Property and equipment, net	478				474				478	474	301
US
Net Sales									3,648	8,708	7,379
Property and equipment, net	432				415				432	415	249
Asia
Net Sales									4,943	7,453	8,184
Property and equipment, net	34				42				34	42	52
Europe
Net Sales									1,427	3,523	925
Property and equipment, net	$ 12				$ 17				$ 12	$ 17	$ 0