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Financial instruments (Details 26) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | $ 12,159 | $ 10,992
Goods [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 1,967 | 3,510
Services [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 4,020 | 4,485
Others [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 6,172 | 2,997
Up to 30 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 6,861 | 7,077
Up to 30 days [member] | Goods [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 1,305 | 2,086
Up to 30 days [member] | Services [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 2,298 | 3,073
Up to 30 days [member] | Others [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 3,258 | 1,918
31 - 60 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 973 | 638
31 - 60 days [member] | Goods [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 59 | 264
31 - 60 days [member] | Services [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 764 | 329
31 - 60 days [member] | Others [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 150 | 45
61 - 90 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 418 | 462
61 - 90 days [member] | Goods [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 47 | 35
61 - 90 days [member] | Services [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 0 | 116
61 - 90 days [member] | Others [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 371 | 311
91 - 120 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 610 | 667
91 - 120 days [member] | Goods [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 39 | 65
91 - 120 days [member] | Services [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 453 | 387
91 - 120 days [member] | Others [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 118 | 215
121 - 365 days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 3,297 | 2,148
121 - 365 days [member] | Goods [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 517 | 1,060
121 - 365 days [member] | Services [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 505 | 580
121 - 365 days [member] | Others [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 2,275 | 508
366 and more days [member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 0 | 0
366 and more days [member] | Goods [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 0 | 0
366 and more days [member] | Services [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | 0 | 0
366 and more days [member] | Others [Member] |  |
Financial instruments [Line Items] |  |
Trade And Other Current Payables To Trade Suppliers Past Due | $ 0 | $ 0

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