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Trade accounts payable (Tables)
12 Months Ended
Dec. 31, 2019
Text block [abstract]  
Schedule of Trade Accounts Payable
   
2019
   
2018
 
Domestic trade accounts payable
   94,887    115,672 
Foreign suppliers
   290    1,736 
Other
   2,648    428 
  
 
 
   
 
 
 
  
 
97,825
 
  
 
117,836