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Note 3 - Inventories (Tables)
9 Months Ended
Sep. 29, 2013
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
   
September 29, 2013
   
December 31, 2012
 
Raw materials
  $ 16,458     $ 15,023  
Work in process
    3,353       4,863  
Finished goods
    8,018       10,484  
    $ 27,829     $ 30,370