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Note 4 - Inventories (Tables)
6 Months Ended
Jun. 30, 2016
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
 
 
June
3
0
,
201
6
 
 
December 31,
201
5
 
Raw materials
  $ 9,334     $ 7,982  
Finished goods
    5,368       4,096  
Total
  $ 14,702     $ 12,078