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17. Share capital and additional paid-in capital (Tables) | 12 Months Ended
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Dec. 31, 2018
Share Capital And Additional Paidin Capital Tables Abstract |
Share capital and additional paid-in capital |
|  | Share capital |  | Additional paid-in capital |  | Total
Balance at December 31, 2016 |  | 18,197,583 |  | 183,604 |  | 18,381,187
Payment of Other reserve constitution - Share-bases compensation plan (Note 25) |  | - |  | 46,317 |  | 46,317
Balance at December 31, 2017 |  | 18,197,583 |  | 229,921 |  | 18,427,504
Payment of Other reserve constitution - Share-bases compensation plan (Note 25) |  | - |  | 10,700 |  | 10,700
Balance at December 31, 2018 |  | 18,197,583 |  | 240,621 |  | 18,438,204

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