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Note 7 - Investments - Related Parties (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Investment [Table Text Block]
Balance at January 1, 2016
   $
-
  
Investment in convertible promissory notes of AVLP - Gross
    
997
  
Original issue discount
    
(47
 )
Accretion of discount
    
2
  
Investment in convertible promissory note of AVLP - Net
    
952
  
Investment in common stock of AVLP
    
84
  
Balance at December 31, 2016
   $
1,036
  
Schedule of Cost Method Investments [Table Text Block]
 
 
2016
 
 
2015
 
Balance at January 1, 2016
   $
90
     $
207
 
Impaired
    
-
      
(110
 )
Exchange rate
    
-
      
(7
 )
Disposed/(sold)
    
(90
 )    
-
  
Balance at December 31, 2016
   $
-
     $
90