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Trade and other receivables, net - Summary (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Non-current    
Advances to suppliers $ 952 $ 1,704
Income tax credits 6,862 5,283
Non-income tax credits 19,156 18,195
Judicial deposits 1,674 2,188
Receivable from disposal of subsidiary (Note 21) 9,830 23,093
Other receivables 3,757 1,803
Non-current portion 42,231 52,266
Current    
Trade receivables 60,703 54,565
Prepaid expenses 9,405 10,427
Advances to suppliers 19,074 17,751
Income tax credits 1,846 1,709
Non-income tax credits 29,414 33,628
Receivable from disposal of subsidiary (Note 21) 17,259 15,506
Cash collateral 21 36
Other receivables 8,127 12,040
Subtotal 85,146 91,097
Trade and other receivables, net 145,849 145,662
Trade and other receivables 188,080 197,928
Reclassified from property, plant and equipment 303 363
Gross | Trade receivables excluding related party    
Current    
Trade receivables 63,726 58,530
Allowance for trade receivables    
Current    
Trade receivables $ 3,023 $ 3,965