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Capital management policies and procedures (Tables)
 12 Months Ended
Dec. 31, 2018
Capital management policies and procedures [Abstract]  
Capital Management Summary
At December 31, 2018 and 2017, the capital management is summarized as follows:

  
2018
  
2017
 
Stockholders’ equity
 
$
2,124,258
  
$
2,229,062
 
         
Total financial debt
  
615,425
   
898,618
 
Cash and cash equivalents
  
(318,155
)
  
(461,554
)
General financing
 
$
297,270
  
$
437,064
 
         
Ratio of total debt to stockholders’ equity
  0.14
   0.20