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11. LONG-TERM DEBT (Tables)
12 Months Ended
May. 31, 2015
Long-term Debt Tables  
Long-term debt, net of debt issuance costs

    Long-term debt, net of debt issuance costs (in thousands):

    May 31,  
    2015     2014  
Principal   $ 4,110     $ --  
Unamortized debt issuance costs     (319 )     --  
    $ 3,791     $ --