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Note 18 - Cash and Cash Equivalents and Other Investments
 12 Months Ended
Dec. 31, 2019
Statement Line Items [Line Items]  
Disclosure of cash and cash equivalents and other investments [text block]
18
Cash and cash equivalents and other investments
 
    Year ended December 31,
    2019   2018
Cash and cash equivalents                
Cash at banks    
118,314
      
81,211
  
Liquidity funds    
1,166,697
      
160,198
  
Short – term investments    
269,288
      
186,952
  
     
1,554,299
      
428,361
  
Other investments - current                
Fixed Income (time-deposit, zero coupon bonds, commercial papers)    
65,874
      
300,410
  
Bonds and other fixed Income    
144,502
      
187,324
  
     
210,376
      
487,734
  
Other investments - Non-current                
Bonds and other fixed Income    
18,012
      
113,829
  
Others    
6,922
      
4,326
  
     
24,934
      
118,155