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7. INCOME TAXES (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
May 31, 2013
May 31, 2012
May 31, 2011
Components of Loss Before Income Tax (Expense) Benefit      
Domestic $ (3,392) $ (3,590) $ (4,424)
Foreign 3 186 1,002
Loss before income tax (expense) benefit $ (3,389) $ (3,404) $ (3,422)