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Payroll and social securities payable
 12 Months Ended
Dec. 31, 2017
Subclassifications of assets, liabilities and equities [abstract]  
Payroll and social security liabilities
Payroll and social security liabilities
 
2017
 
2016
Non-current
 

 
 

Social security payable
1,240

 
1,235

 
1,240

 
1,235

Current
 

 
 

Salaries payable
6,199

 
7,351

Social security payable
3,702

 
3,063

Provision for vacations
12,323

 
12,109

Provision for bonuses
5,043

 
4,321

 
27,267

 
26,844

Total payroll and social security liabilities
28,507

 
28,079