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Note 5 - Inventories
9 Months Ended
Feb. 28, 2015
Inventory Disclosure [Abstract]  
Inventory Disclosure [Text Block]

5.

INVENTORIES


Inventories are stated at the lower of cost (first-in, first-out basis) or market (net realizable value). Inventories as of February 28, 2015, and May 31, 2014 include the following (in thousands):


   

As of

 
   

February 28, 2015

   

May 31, 2014

 
                 

Raw materials and supplies

  $ 13,876       12,110  

Work in process

    8,330       9,146  

Finished goods

    24,854       27,895  
    $ 47,060       49,151