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Note 7 - Debt (Tables)
3 Months Ended
Mar. 31, 2015
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments [Table Text Block]
   

March 31,

   

December 31,

 
   

2015

   

2014

 
                 

Unsecured promissory note - Quercus Trust (1)

  $ 70     $ 70  

Long-term debt

  $ 70     $ 70