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Consolidated Statements of Changes in Equity - USD ($) $ in Thousands | Share capital | Share purchase warrants | Contributed surplus | Deficit | Accumulated other comprehensive loss | Total
--- | --- | --- | --- | --- | --- | ---
Balance-beginning of period at Dec. 31, 2015 | $ 1,130,779 | $ 0 | $ 53,965 | $ (944,097) | $ (73,592) | $ 167,055
Shares issued-net of issue costs | 8,841 |  |  |  |  | 8,841
Flow-through share premium | (1,843) |  |  |  |  | (1,843)
Shares issued on acquisition of Hook Carter property (note 12) | 2,854 |  |  |  |  | 2,854
Share options exercised-cash | 0 |  |  |  |  | 0
Share options exercised-non cash | 0 |  | 0 |  |  | 0
Warrants issued in connection with APG Arrangement (note 13) |  | 0 |  |  |  | 0
Stock-based compensation expense |  |  | 341 |  |  | 341
Net loss |  |  |  | (17,343) |  | (17,343)
Unrealized gain (loss) on investments |  |  |  |  | 3 | 3
Unamortized experience gain – post employment liability |  |  |  |  | 428 | 428
Foreign currency translation |  |  |  |  | 13,012 | 13,012
Foreign currency translation realized in net income (loss) |  |  |  |  | (637) | (637)
Balance-end of period at Dec. 31, 2016 | 1,140,631 | 0 | 54,306 | (961,440) | (60,786) | 172,711
Shares issued-net of issue costs | 13,955 |  |  |  |  | 13,955
Flow-through share premium | (2,839) |  |  |  |  | (2,839)
Shares issued on acquisition of Hook Carter property (note 12) |  |  |  |  |  | 0
Share options exercised-cash | 70 |  |  |  |  | 70
Share options exercised-non cash | 110 |  | (110) |  |  | 0
Warrants issued in connection with APG Arrangement (note 13) |  | 333 |  |  |  | 333
Stock-based compensation expense |  |  | 969 |  |  | 969
Net loss |  |  |  | (14,168) |  | (14,168)
Unrealized gain (loss) on investments |  |  |  |  | 4 | 4
Unamortized experience gain – post employment liability |  |  |  |  | 0 | 0
Foreign currency translation |  |  |  |  | 12,917 | 12,917
Foreign currency translation realized in net income (loss) |  |  |  |  | 0 | 0
Balance-end of period at Dec. 31, 2017 | $ 1,151,927 | $ 333 | $ 55,165 | $ (975,608) | $ (47,865) | $ 183,952

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