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Share Capital | 12 Months Ended
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Dec. 31, 2018
Share Capital [abstract] |
Share Capital | 22. Share Capital (a) Authorized S<R>s</R>hare C<R>c</R>apital The Company has an unlimited number of common shares without par value authorized for issue. In February 2017, the Company closed an offering by issuing an aggregate of 11,873,750 common shares at a price of US$6.30 per common share for gross proceeds of $74,804, or net proceeds of $70,497 after share issuance costs. (b) Stock Options The Company’s Stock Option Plan, as amended and approved from time to time, permits the Company to issue up to 12,200,000 stock options. As at December 31, 2018, a total of 1,574,403 common shares were available for issuance under the plan.
|  | Number of stock options |  | Weighted average exercise price
|  |  |  | Canadian dollars
Outstanding, December 31, 2016 |  | 844,993 |  | $ | 4.19
Exercised |  | (307,160) |  |  | 3.39
Forfeited |  | 617,694 |  |  | 6.35
Outstanding, December 31, 2017 |  | 1,155,527 |  |  | 5.56
Exercised |  | (20,000) |  |  | 0.85
Granted |  | 648,502 |  |  | 6.21
Outstanding, December 31, 2018 |  | 1,784,029 |  | $ | 5.85
Vested and exercisable, December 31, 2017 |  | 537,833 |  | $ | 4.64
Vested and exercisable, December 31, 2018 |  | 826,680 |  | $ | 5.37
The assumptions used to estimate the fair value of the stock options granted during the year ended December 31, 2018 were a risk-free interest rate of 1.79% - 1.90%, expected volatility of 67.56% - 68.16%, expected life of 3 years, expected forfeiture rate of 5.57%, and an expected dividend yield of nil. The fair value, as determined using the Black-Scholes model, was between $2.69 and $3.09 per option granted in the period. During the year ended December 31, 2018, the Company expensed a total of $1,358, in share-based payments related to the vesting of stock options (2017 – $674). (c) Warrants
|  | Number of warrants |  | Weighted average exercise price
|  |  |  | Canadian dollars
Outstanding, December 31, 2016 |  | 582,977 |  | $ | 6.01
Exercised |  | (238,515) |  |  | 6.01
Outstanding, December 31, 2017 |  | 344,462 |  | $ | 6.01
Exercised |  | (204,462) |  |  | 6.01
Expired unvested |  | (140,000) |  |  | 6.01
Outstanding, December 31, 2018 |  | - |  | $ | -

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- Definition The entire disclosure for share capital, reserves and other equity interest. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 79 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_79&doctype=Standard -URIDate 2017-03-09 + Details
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