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Consolidated statements of cash flows: (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of Consolidated statements of cash flows [Abstract] |
Details And Disclosure About Movement Of Debt [Text Block] | As of December 31, 2017 and 2018, the analysis of net debt and movements in net debt is presented below:
|  | Long-term |  |  | Bank |
|  | Debt |  |  | Loans |
|  | 2017 |  |  | 2018 |  |  | 2017 |  |  | 2018 |
Accounts payable |  | $ | 340,288 |  |  | $ | 324,590 |  |  | $ |  |  |  |  |  |
Bank loans (Note 11) |  |  |  |  |  |  |  |  |  |  | 173,471 |  |  | $ | 175,515 |
Bank loans (Note 11) |  |  |  |  |  |  |  |  |  |  | 10,321,382 |  |  |  | 7,042,598 |
Long-term debt (Note 12) |  |  | 7,149,177 |  |  |  | 6,957,678 |  |  |  |  |  |  |  |  |
Balances at December 31 |  | $ | 7,489,465 |  |  | $ | 7,282,268 |  |  | $ | 10,494,853 |  |  | $ | 7,218,113 |
Balances at January 1 of net debt |  | $ |  |  |  | $ | 7,489,465 |  |  | $ | 4,460,776 |  |  | $ | 10,494,853 |
Acquisition of Aerostar and Airplan |  |  | 7,182,963 |  |  |  |  |  |  |  | 3,424,717 |  |  |  |  |
Interest expense |  |  | 295,834 |  |  |  | 475,110 |  |  |  | 322,996 |  |  |  | 696,641 |
Proceeds from bank loans |  |  |  |  |  |  |  |  |  |  | 8,000,000 |  |  |  |  |
Interest paid |  |  | (277,068 | ) |  |  | (646,418 | ) |  |  | (351,152 | ) |  |  | (492,653 | )
Payments of the long-term debt and bank loan |  |  | (102,907 | ) |  |  |  |  |  |  | (5,339,338 | ) |  |  | (3,090,124 | )
Foreign currency translation |  |  | 390,643 |  |  |  | (35,889 | ) |  |  | 217,385 |  |  |  | (166,301 | )
Exchange (income) / loss on foreign currency |  |  |  |  |  |  |  |  |  |  | (240,531 | ) |  |  | (224,303 | )
Balances at December 31 |  | $ | 7,489,465 |  |  | $ | 7,282,268 |  |  | $ | 10,494,853 |  |  | $ | 7,218,113 |

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