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Other current and non-current non-financial assets | 12 Months Ended
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Dec. 31, 2019
Disclosure of other non-financial assets [Abstract] |
Disclosure of other non-financial assets [Text Block] | Note 16 Other current and non-current non-financial assets As of December 31, 2019, and December 31, 2018, the detail of other current and non-current assets is as follows:
Other non-financial assets, current |  | As of December 31, ‎ 2019 |  |  | As of December 31, ‎ 2018 |
|  | ThUS$ |  |  | ThUS$ |
Domestic value added tax |  |  | 17,807 |  |  |  | 20,209 |
Foreign value added tax |  |  | 8,566 |  |  |  | 7,211 |
Prepaid mining property |  |  | 1,244 |  |  |  | 1,329 |
Prepaid insurance |  |  | 7,135 |  |  |  | 1,763 |
Other prepayments |  |  | 1,423 |  |  |  | 1,774 |
Refund of value added tax to exporters |  |  | 10,560 |  |  |  | 12,545 |
Other taxes |  |  | 3,213 |  |  |  | 2,800 |
Other assets |  |  | 604 |  |  |  | 341 |
Total |  |  | 50,552 |  |  |  | 47,972 |
Other non-financial assets, non-current |  | As of December 31, ‎ 2019 |  |  | As of December 31, ‎ 2018 |
|  | ThUS$ |  |  | ThUS$ |
Stain development expenses and prospecting expenses (1) |  |  | 18,654 |  |  |  | 26,189 |
Guarantee deposits |  |  | 551 |  |  |  | 712 |
Other assets |  |  | 524 |  |  |  | 638 |
Total |  |  | 19,729 |  |  |  | 27,539 |
1) Reconciliation of changes in assets for exploration and mineral resource evaluation, by type. Movements in assets relating to the exploration and evaluation of mineral resources as of December 31, 2019, 2018 and 2017:
Reconciliation |  | As of December ‎ 31, 2019 |  |  | As of December ‎ 31, 2018 |  |  | As of December ‎ 31, 2017 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Opening balance |  |  | 26,189 |  |  |  | 17,721 |  |  |  | 23,008 |
Change in assets for exploration and evaluation of mineral resources |  |  |  |  |  |  |  |  |  |  |  |
Additions |  |  | - |  |  |  | 11,298 |  |  |  | - |
Short-term reclassifications |  |  | (1,311 | ) |  |  | 1,987 |  |  |  | 595 |
Increase (decrease) due to transfers and other charges |  |  | (6,224 | ) |  |  | (4,817 | ) |  |  | (5,882 | )
Total changes |  |  | (7,535 | ) |  |  | 8,468 |  |  |  | (5,287 | )
Final balance |  |  | 18,654 |  |  |  | 26,189 |  |  |  | 17,721 |
As of the reporting date, no revaluations of assets for exploration and assessment of mineral resources have been conducted.

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