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Note 40 - Subsequent Events (Details Textual) - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  |  |  |  |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
May 03, 2021 | Nov. 25, 2020 | Nov. 04, 2020 | Nov. 20, 2019 | May 22, 2019 | Nov. 21, 2018 | May 23, 2018 | Nov. 22, 2017 | Nov. 30, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | May 26, 2021
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends paid, ordinary shares per share (in dollars per share) |  | $ 0.07 | $ 0.07 |  | $ 0.28 | $ 0.13 | $ 0.28 | $ 0.13 |  |  |  |  |
Dividends paid, per ADS (in dollars per share) |  | $ 0.14 |  |  | $ 0.56 | $ 0.26 | $ 0.56 | $ 0.26 |  |  |  |  |
Dividends recognised as distributions to owners |  | $ 82,600 |  | $ 153,000 | $ 484,000 |  | $ 484,000 |  | $ 153,000 | $ 87,938 | $ 485,827 | $ 487,681 |
Dividends payable, amount per ads (in dollars per share) |  |  | $ 0.14 |  |  |  |  |  |  |  |  |  |
Annual Dividend Proposal [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Annual dividend proposed to be distributed (in dollars per share) | $ 0.21 |  |  |  |  |  |  |  |  |  |  |  |
Annual dividend proposed to be distributed, amount per ads (in dollars per share) | $ 0.42 |  |  |  |  |  |  |  |  |  |  |  |
Annual dividend proposed to be distributed | $ 248,000 |  |  |  |  |  |  |  |  |  |  |  |
Dividends payable, amount per share (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.14
Dividends payable, amount per ads (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.28
Annual dividend payable |  |  |  |  |  |  |  |  |  |  |  |  | $ 165,000

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