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Shares | 12 Months Ended
--- | ---
Dec. 31, 2017
Equity [Abstract] |
Shares | Shares a) Common shares Issued and outstanding:
|  | Voting common shares |  |  | Treasury shares |  |  | Common shares outstanding, net of treasury shares |
Issued and outstanding at December 31, 2015 |  | 33,150,281 |  |  | (1,256,803 | ) |  | 31,893,478 |
Issued upon exercise of stock options (note 21(b)) |  | 102,040 |  |  | — |  |  | 102,040 |
Purchase of treasury shares for settlement of certain equity classified stock-based compensation (note 21(c(i)) and 21(d)) |  | — |  |  | (1,043,998 | ) |  | (1,043,998 | )
Settlement of certain equity classified stock-based compensation |  | — |  |  | 87,554 |  |  | 87,554 |
Retired through Share Purchase Program (note 17(c)) |  | (2,733,414 | ) |  | — |  |  | (2,733,414 | )
Issued and outstanding at December 31, 2016 |  | 30,518,907 |  |  | (2,213,247 | ) |  | 28,305,660 |
Issued upon exercise of stock options (note 21(b)) |  | 176,800 |  |  | — |  |  | 176,800 |
Purchase of treasury shares for settlement of certain equity classified stock-based compensation (note 21(c(i)) and 21(d)) |  | — |  |  | (758,271 | ) |  | (758,271 | )
Settlement of certain equity classified stock-based compensation |  | — |  |  | 353,592 |  |  | 353,592 |
Retired through Share Purchase Programs (note 17(c)) |  | (2,625,557 | ) |  | — |  |  | (2,625,557 | )
Issued and outstanding at December 31, 2017 |  | 28,070,150 |  |  | (2,617,926 | ) |  | 25,452,224 |
On June 12, 2014, the Company entered into a trust arrangement whereby the trustee will purchase and hold common shares, classified as treasury shares on our Consolidated Balance Sheets, until such time that units issued under certain stock-based compensation plans are to be settled (note 21(c(i)) and 21(d)). Upon settlement of certain equity classified stock-based compensation during the year ended December 31, 2017, the Company repurchased 161,285 shares at $987 to satisfy the recipient tax withholding requirements (year ended December 31, 2016 - 35,313 shares at $130). The repurchased shares to satisfy the recipient tax withholding requirements are net against the purchase of treasury shares for settlement of certain equity classified stock-based compensation. b) Net income (loss) per share
Year ended December 31, |  | 2017 |  |  | 2016 |
Net income (loss) available to common shareholders |  | $ | 5,264 |  |  | $ | (445 | )
Weighted average number of common shares |  | 26,697,066 |  |  | 29,965,899 |
Weighted average of effects: |  |  |  |
Dilutive effect of treasury shares |  | 2,622,957 |  |  | — |
Dilutive effect of stock options |  | 285,703 |  |  | — |
Weighted average number of diluted common shares |  | 29,605,726 |  |  | 29,965,899 |
Basic net income (loss) per share |  | $ | 0.20 |  |  | $ | (0.01 | )
Diluted net income (loss) per share |  | $ | 0.18 |  |  | $ | (0.01 | )
For the year ended December 31, 2017, there were 469,819 stock options, nil treasury shares and 2,949,309 shares issuable on conversion of Convertible Debentures that were anti-dilutive and therefore not considered in computing diluted earnings per share (year ended December 31, 2016 – 1,176,080 stock options and 2,213,247 treasury shares). c) Share purchase programs The Company engaged in the following normal course issuer bids ("NCIBs") during the years ended December 31, 2016 and December 31, 2017:
Commencement date |  | Facilities |  | Maximum number of shares to be purchased |  |  | Actual number of shares purchased and subsequently cancelled |  |  | Reduction to common shares |  |  | Increase to additional paid in capital |
March 21, 2016 |  | NYSE |  | 1,657,514 |  |  | 1,657,514 |  |  | $ | 14,121 |  |  | $ | 9,021 |
August 9, 2016 |  | TSX |  | 1,075,968 |  |  | 1,075,900 |  |  | 9,237 |  |  | 5,133 |
Total during the year ended December 31, 2016 |  |  |  | 2,733,482 |  |  | 2,733,414 |  |  | $ | 23,358 |  |  | $ | 14,154 |
First phase: amended NCIB(i) |  | TSX |  | 819,395 |  |  | 819,395 |  |  | $ | 7,057 |  |  | $ | 1,576 |
Second phase: amended NCIB(ii) |  | TSX |  | 838,119 |  |  | 663,400 |  |  | 5,706 |  |  | 1,908 |
August 14, 2017(iii)(iv) |  | NYSE, TSX |  | 2,424,333 |  |  | 1,142,762 |  |  | 9,810 |  |  | 4,119 |
Total during the year ended December 31, 2017 |  |  |  | 4,081,847 |  |  | 2,625,557 |  |  | $ | 22,573 |  |  | $ | 7,603 |
(i) On March 28, 2017 the Company announced an increase to the maximum number of shares to be purchased relating to the NCIB that commenced on August 9, 2016 from the original 1,075,968 to 1,895,363 as of April 1, 2017. (ii) On May 25, 2017 the Company announced a further increase to the maximum number of shares to be purchased relating to the NCIB that commenced on August 9, 2016 from the amended 1,895,363 to 2,733,482 as of June 1, 2017. (iii) This NCIB is ongoing. All other NCIBs have reached expiration. (iv) In order to comply with relevant securities laws, the Company can purchase a maximum of 1,460,089 of the shares on the NYSE, which represents 5% of the issued and outstanding common shares. d) Dividends The Company intends to pay an annual aggregate dividend of eight Canadian cents ($0.08) per common share, payable on a quarterly basis. During the year ended December 31, 2017, the Company paid regular quarterly cash dividends of $0.02 per share on common shares (December 31, 2016 - $0.02). At December 31, 2017, an amount of $510 was included in accrued liabilities related to the dividend declared on October 31, 2017 (December 31, 2016 - $569).

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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