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INVESTMENTS | 6 Months Ended
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Jun. 30, 2019
INVESTMENTS | NOTE 4 INVESTMENTS The following is a summary of the activity in investments for the six months ended June 30, 2019 and 2018: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As at | ​ | Additions | ​ | Net gain | ​ | Disposals | ​ | Unrealized | ​ | Fair value
​ | ​ | December 31, | ​ | during | ​ | (loss) on | ​ | during | ​ | gain (loss) on | ​ | June 30,
​ |  | 2018 |  | period |  | securities sold |  | period |  | securities held |  | 2019
Marketable equity securities | ​ | $ | 2,718 | ​ | $ | 264 | ​ | $ | — | ​ | $ | — | ​ | $ | 1,372 | ​ | $ | 4,354
Warrants | ​ |  | 413 | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 380 | ​ |  | 793
Investments | ​ | $ | 3,131 | ​ | $ | 264 | ​ | $ | — | ​ | $ | — | ​ | $ | 1,752 | ​ | $ | 5,147
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As at | ​ | Additions | ​ | Net gain | ​ | Disposals | ​ | Unrealized | ​ | Fair value
​ | ​ | December 31, | ​ | during | ​ | (loss) on | ​ | during | ​ | gain (loss) on | ​ | June 30,
​ |  | 2017 |  | period |  | securities sold |  | period |  | securities held |  | 2018
Marketable equity securities | ​ | $ | 6,404 | ​ | $ | 1,211 | ​ | $ | (767) | ​ | $ | (2,899) | ​ | $ | (1,637) | ​ | $ | 2,312
Warrants | ​ |  | 1,567 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (702) | ​ | ​ | (865) | ​ | ​ | —
Investments | ​ | $ | 7,971 | ​ | $ | 1,211 | ​ | $ | (767) | ​ | $ | (3,601) | ​ | $ | (2,502) | ​ | $ | 2,312
​ Cost of marketable equity securities and warrants at June 30, 2019 was $3.1 million (December 31, 2018 – $2.9 million). During the three months ended June 30, 2019, the Company recognized a $0.9 million unrealized gain on investments (same period in 2018 – $0.5 million unrealized loss), which included $0.7 million unrealized gain on equity securities and $0.2 million on warrants. During the three months ended June 30, 2018, the Company sold marketable equity securities for proceeds of $0.2 million and realized a loss of nominal value.

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- Definition The entire disclosure for cash, cash equivalents, investments in debt and equity instruments (including cost and equity investees and related income statement amounts), equity and cost method investments, investments in joint ventures and any other investment. + References No definition available. + Details
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