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Other investments (Tables) | 12 Months Ended
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Dec. 31, 2019
Other Investment Abstract |
Disclosure of detailed information about other investments [Table Text Block] |
|  |  |  |  | 2019 |  |  |  |  | 2018 |  |
|  |  |  |  | $ |  |  |  |  | $ |  |
Fair value through profit or loss (warrants) |  |  |  |  |  |  |  |  |
|  |  | Balance - January 1 |  | 3,348 |  |  |  |  | 8,092 |  |
|  |  | Acquisitions |  | 1,085 |  |  |  |  | 3,093 |  |
|  |  | Exercise |  | (1,055 | ) |  |  |  | - |  |
|  |  | Change in fair value |  | (1,089 | ) |  |  |  | (7,837 | ) |
|  |  | Deemed disposal (Note 7) |  | (589 | ) |  |  |  | - |  |
|  |  |  |  | 1,700 |  |  |  |  | 3,348 |  |
Fair value through other comprehensive income (shares) |  |  |  |  |  |  |  |  |
|  | Balance - January 1 |  | 104,055 |  |  |  |  | 106,841 |  |
|  |  | Acquisitions |  | 27,259 |  |  |  |  | 14,453 |  |
|  |  | Transfer from associates (Note 12) |  | 9,676 |  |  |  |  | 46,625 |  |
|  |  | Change in fair value |  | 13,287 |  |  |  |  | (29,773 | ) |
|  |  | Transfer to associates (Note 12) |  | - |  |  |  |  | (7,048 | ) |
|  |  | Disposals - Share Repurchase (Note 21) |  | (90,546 | ) |  |  |  | - |  |
|  |  | Disposals (i) |  | (6,322 | ) |  |  |  | (27,043 | ) |
|  | Balance - December 31 |  | 57,409 |  |  |  |  | 104,055 |  |
Amortized cost |  |  |  |  |  |  |  |  |
|  | Balance - January 1 |  | 2,200 |  |  |  |  | 200 |  |
|  |  | Acquisition (Note 14) |  | 8,778 |  |  |  |  | 2,000 |  |
|  |  | Transfer to short-term investments |  | (2,200 | ) |  |  |  | - |  |
|  | Balance - December 31 |  | 8,778 |  |  |  |  | 2,200 |  |
Total |  | 67,886 |  |  |  |  | 109,603 |  |
(i) In 2019, an investment in a company classified as an investment at fair value through other comprehensive income was acquired by way of a share exchange. This non-cash transaction resulted in the disposal of the investment in the acquiree and the acquisition of an investment in the acquirer for an amount of $5.7 million.

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