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Note 6 - Inventory (Tables)
12 Months Ended
Dec. 31, 2013
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
   

December 31,

 
    2013     2012  

Raw materials

  $ 19,372     $ 20,645  

Work in process

    16,436       14,198  

Finished goods

    5,017       4,461  

Reserve for excess and obsolete inventory

    (6,403 )     (5,346 )
    $ 34,422     $ 33,958