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Payroll and social securities payable - Summary (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Non-current    
Social security payable $ 1,243 $ 1,075
Non-current payroll and social security liabilities 1,243 1,075
Current    
Salaries payable 2,617 2,774
Social security payable 3,499 2,827
Provision for vacations 8,136 6,866
Provision for bonuses 10,799 10,866
Current payroll and social security liabilities 25,051 23,333
Total payroll and social security liabilities $ 26,294 $ 24,408