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Note 3 - Inventories (Tables)
6 Months Ended
Jun. 30, 2013
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
   

June 30,

   

December 31,

 
   

2013

   

2012

 
                 

Raw materials

  $ 1,719     $ 1,649  

Finished goods

    664       932  

Inventories, net

  $ 2,383     $ 2,581