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Note 7 - Goodwill (Tables)
6 Months Ended
Nov. 30, 2014
Disclosure Text Block Supplement [Abstract]  
Schedule of Goodwill [Table Text Block]
   

November 30, 2014

   

May 31, 2014

 
                 

Balance at beginning of period

  $ 851,563       1,003,463  

Additions:

               

Acquisition of businesses

    667       6,912  

Foreign currency translation adjustment

    (4,668 )     1,188  

Impairment loss

    -       (160,000 )

Balance at end of period

  $ 847,562       851,563