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Note 7 - Inventory (Tables)
12 Months Ended
Dec. 31, 2015
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
 
 
December 31,
 
 
 
2015
 
 
2014
 
Raw materials
  $ 12,388     $ 16,687  
Work in process
    10,366       11,702  
Finished goods
    3,167       6,991  
Reserve for excess and obsolete inventory
    (5,729 )     (6,349 )
    $ 20,192     $ 29,031