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Note 4 - Inventories
9 Months Ended
Feb. 28, 2013
Inventory Disclosure [Text Block]
4.
INVENTORIES

Inventories are stated at the lower of cost (first-in, first-out basis) or market (net realizable value) net of reserves and consist of the following (in thousands):

   
February 28, 2013
   
May 31, 2012
 
             
Raw materials and supplies
  $ 11,547     $ 10,228  
Work in process
    3,614       3,550  
Finished goods
    20,454       19,592  
    $ 35,615     $ 33,370