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Note 3 - Inventories
6 Months Ended
Jun. 30, 2013
Inventory Disclosure [Abstract]  
Inventory Disclosure [Text Block]
3.  
INVENTORIES

Inventories are stated at the lower of cost or market with cost determined under the first-in, first-out (FIFO) method. The composition of inventories was:

   
June 30, 2013
   
December 31, 2012
 
Raw materials
  $ 16,346     $ 15,023  
Work in process
    3,470       4,863  
Finished goods
    11,205       10,484  
    $ 31,021     $ 30,370