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Note 17 - Trade Receivables (Tables) | 12 Months Ended
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Dec. 31, 2017
Statement Line Items [Line Items] |
Disclosure of detailed information about current trade receivables [text block] |
|  | Year ended December 31, |
|  | 2017 |  |  | 2016 |
Current accounts |  |  | 1,240,769 |  |  |  | 1,026,026 |
Receivables from related parties |  |  | 51,676 |  |  |  | 14,383 |
|  |  | 1,292,445 |  |  |  | 1,040,409 |
Allowance for doubtful accounts (see Note 23 (i)) |  |  | (78,385 | ) |  |  | (85,724 | )
|  |  | 1,214,060 |  |  |  | 954,685 |
Disclosure if detailed information about the aging of trade receivables [text block] |
|  |  |  |  |  |  |  | Past due |
|  | Trade Receivables |  |  | Not Due |  |  | 1 - 180 days |  |  | > 180 days |
At December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Guaranteed |  |  | 247,079 |  |  |  | 219,764 |  |  |  | 22,978 |  |  |  | 4,337 |
Not guaranteed |  |  | 1,045,366 |  |  |  | 841,737 |  |  |  | 115,245 |  |  |  | 88,384 |
Guaranteed and not guaranteed |  |  | 1,292,445 |  |  |  | 1,061,501 |  |  |  | 138,223 |  |  |  | 92,721 |
Allowance for doubtful accounts |  |  | (78,385 | ) |  |  | - |  |  |  | - |  |  |  | (78,385 | )
Net Value |  |  | 1,214,060 |  |  |  | 1,061,501 |  |  |  | 138,223 |  |  |  | 14,336 |
At December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Guaranteed |  |  | 355,508 |  |  |  | 272,393 |  |  |  | 32,241 |  |  |  | 50,874 |
Not guaranteed |  |  | 684,901 |  |  |  | 518,984 |  |  |  | 87,379 |  |  |  | 78,538 |
Guaranteed and not guaranteed |  |  | 1,040,409 |  |  |  | 791,377 |  |  |  | 119,620 |  |  |  | 129,412 |
Allowance for doubtful accounts |  |  | (85,724 | ) |  |  | (62 | ) |  |  | (67 | ) |  |  | (85,595 | )
Net Value |  |  | 954,685 |  |  |  | 791,315 |  |  |  | 119,553 |  |  |  | 43,817 |

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