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9. INVESTMENTS (Tables) | 12 Months Ended
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Dec. 31, 2017
Investments Tables |
Investments |
|  |  |  | At December 31 |  | At December 31
(in thousands) |  |  |  | 2017 |  | 2016
Investments: |  |  |  |  |  |
Equity instruments-fair value through profit and loss | $ | 5,846 | $ | 3,745
Equity instruments-available for sale |  |  |  | 20 |  | 15
Debt instruments-fair value through profit and loss |  | 30,136 |  | -
|  |  | $ | 36,002 | $ | 3,760
Investments-by duration |  |  |  |  |  |
Current |  |  | $ | 30,136 | $ | -
Long-term |  |  |  | 5,866 |  | 3,760
|  |  | $ | 36,002 | $ | 3,760
(in thousands) |  |  |  | 2017 |  | 2016
Balance-January 1 |  |  | $ | 3,760 | $ | 7,778
Purchases |  |  |  |  |  |
Equity instruments |  |  |  | 149 |  | 215
Debt instruments |  |  |  | 29,740 |  | -
Sales |  |  |  |  |  |
Equity instruments |  |  |  | - |  | (760)
Debt instruments |  |  |  | (1,967) |  | (7,763)
Acquisition, divestitures |  |  |  |  |  |
Receipts from option agreement |  |  |  | - |  | 1,242
Receipts from African Mining Division divestiture |  |  |  | - |  | 1,162
Fair value changes through profit and loss |  |  |  | 1,891 |  | 1,473
Fair value changes through OCI |  |  |  | 4 |  | 3
Foreign exchange |  |  |  | 2,425 |  | 410
Balance-December 31 |  |  | $ | 36,002 | $ | 3,760

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