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Note 23 - Current Allowances and Provisions (Tables)
 12 Months Ended
Dec. 31, 2019
Statement Line Items [Line Items]  
Disclosure of detailed information about current allowances and provisions deducted from assets [text block]
Year ended December 31, 2019   Allowance for doubtful
accounts - Trade receivables		   Allowance for other doubtful
accounts - Other receivables		   Allowance for
inventory obsolescence
             
Values at the beginning of the year    
(66,535
 )    
(6,784
 )    
(209,796
 )
Translation differences    
9
      
88
      
794
  
Increase due to business combinations    
(1,788
 )    
-
      
(10,761
 )
Additional / reversals allowances    
16,256
      
1,239
      
(29,138
 )
Used    
3,276
      
565
      
31,184
  
At December 31, 2019    
(48,782
 )    
(4,892
 )    
(217,717
 )
Year ended December 31, 2018   Allowance for doubtful
accounts - Trade receivables		   Allowance for other doubtful
accounts - Other receivables		   Allowance for
inventory obsolescence
             
Values at the beginning of the year    
(78,385
 )    
(6,255
 )    
(216,068
 )
Effect of adoption of new standards    
6,423
      
-
      
-
  
Translation differences    
329
      
359
      
3,575
  
Additional allowances    
(1,751
 )    
(1,179
 )    
(25,457
 )
Used    
6,849
      
291
      
28,154
  
At December 31, 2018    
(66,535
 )    
(6,784
 )    
(209,796
 )
Disclosure of detailed information about current allowances and provisions from liabilities [text block]
Year ended December 31, 2019   Sales risks   Other claims and
contingencies		   Total
Values at the beginning of the year    
6,814
      
17,469
      
24,283
  
Translation differences    
(28
 )    
(570
 )    
(598
 )
Increase due to business combinations    
505
      
8,000
      
8,505
  
Additional/ reversals provisions    
11,880
      
(3,219
 )    
8,661
  
Reclassifications    
-
      
(5,641
 )    
(5,641
 )
Used    
(13,304
 )    
(4,889
 )    
(18,193
 )
At December 31, 2019    
5,867
      
11,150
      
17,017
  
Year ended December 31, 2018   Sales risks   Other claims and
contingencies		   Total
Values at the beginning of the year    
11,396
      
20,934
      
32,330
  
Translation differences    
(103
 )    
(2,205
 )    
(2,308
 )
Additional provisions    
2,638
      
6,463
      
9,101
  
Reclassifications    
-
      
2,406
      
2,406
  
Used    
(7,117
 )    
(10,129
 )    
(17,246
 )
At December 31, 2018    
6,814
      
17,469
      
24,283