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Note 4 - Inventory (Tables)
6 Months Ended
Jun. 30, 2015
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
(in thousands)
 
June 30,
201
5
 
 
December 31,
201
4
 
Raw materials
  $ 2,734     $ 3,605  
Finished goods
    2,736       2,820  
Inventory, net
  $ 5,470     $ 6,425