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Note 4 - Inventories (Tables)
6 Months Ended
Jul. 04, 2015
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
July 4, 2015
   
December 31, 2014
 
                 
Raw materials
  $ 3,783     $ 4,584  
Work in process
    2,830       3,052  
Finished goods
    3,118       6,208  
Total
  $ 9,731     $ 13,844