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INVESTMENTS (Tables) | 12 Months Ended
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Dec. 31, 2020
Investments Abstract |
Investments |
|  | At December 31 |  | At December 31
(in thousands) |  | 2020 |  | 2019
Investments: |  |  |  |  |  |  |  |
Equity instruments |  | $ | 16,950 |  |  | $ | 12,104 |
|  | $ | 16,950 |  |  | $ | 12,104 |
Investments-by balance sheet presentation: |  |  |  |  |  |  |  |
Current |  | $ | 16,657 |  |  | $ | — |
Long-term |  |  | 293 |  |  |  | 12,104 |
|  | $ | 16,950 |  |  | $ | 12,104 |
Investments continuity summary |
(in thousands) |  | 2020 |  | 2019
Balance-January 1 |  | $ | 12,104 |  |  | $ | 2,255 |
Proceeds from property disposals (note 10) |  |  | 270 |  |  |  | — |
Purchase of investments |  |  | 7 |  |  |  | 511 |
Sale of investments |  |  | (477 | ) |  |  | — |
Transfer from investment in associates at fair value (note 8) |  |  | — |  |  |  | 10,423 |
Fair value gain (loss) to profit and loss (note 20) |  |  | 5,046 |  |  |  | (1,085 | )
Balance-December 31 |  | $ | 16,950 |  |  | $ | 12,104 |

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