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Employee benefits - Expenses recognized in profit or loss (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
IFRS Statement [Line Items] |  |  |
Interest income | $ 876 | $ 967 | $ 2,013
Cost of revenues | 798,519 | 666,501 | 533,916
Sales and marketing | 23,080 | 16,675 | 17,628
Defined Benefit Plan [Member] |  |  |
IFRS Statement [Line Items] |  |  |
Current service costs |  | 6 | 26
Interest income | (2) | (4) | (19)
Total Expenses | (2) | 2 | 7
Cost of revenues | 6 | 6 | 6
Research and development | (8) | (5) | 1
General and administrative |  | 1 |
Total Expenses | $ (2) | $ 2 | $ 7

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