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CASH AND CASH EQUIVALENTS (Tables) | 12 Months Ended
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Dec. 31, 2017
Cash and cash equivalents [abstract] |
Schedule of cash and cash equivalents |
| December 31, 2017 |  | December 31, 2016 |
| $ |  | $ |
Cash | 131,589 |  | 181,421 |
Short-term investments | 328,275 |  | 145,706 |
| 459,864 |  | 327,127 |

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