13. SEGMENT INFORMATION (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	May 31, 2013	Feb. 28, 2013	Nov. 30, 2012	Aug. 31, 2012	May 31, 2012	Feb. 29, 2012	Nov. 30, 2011	Aug. 31, 2011	May 31, 2013	May 31, 2012	May 31, 2011
Net Sales	$ 3,262	$ 3,340	$ 5,054	$ 4,832	$ 4,676	$ 2,855	$ 3,860	$ 4,130	$ 16,488	$ 15,521	$ 13,737
Property and equipment, net	301				510				301	510	954
US
Net Sales									15,748	14,173	11,911
Property and equipment, net	249				441				249	441	872
Asia
Net Sales									97	662	1,404
Property and equipment, net	52				66				52	66	72
Europe
Net Sales									643	686	422
Property and equipment, net	$ 0				$ 3				$ 0	$ 3	$ 10