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Note 5 - Inventories (Tables)
12 Months Ended
Dec. 31, 2015
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
December 31,
 
   
2015
   
2014
 
Raw materials
  $ 2,882     $ 4,584  
Work in progress
    2,224       3,052  
Finished goods
    2,121       6,208  
Total
  $ 7,227     $ 13,844