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MARKETABLE SECURITIES (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure Of Detailed Information About Marketable Securities [Abstract] |
Disclosure of the movement in marketable securities |
| December 31, 2017 |  | December 31, 2016 |
| $ |  | $ |
Balance, beginning of year | 148,944 |  | 88,184 |
Additions | 5,295 |  | 7,329 |
Additions from the acquisition of Seabee Gold Operation (note 3) | — |  | 351 |
Disposals | (72,132 | ) | (5,327 | )
Fair value adjustments | 31,894 |  | 58,407 |
Balance, end of year | 114,001 |  | 148,944 |
Subsequent to the reporting date, we disposed of marketable securities for cash proceeds of $24,983,000.

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