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Weighted average basic and diluted number of common shares outstanding | 12 Months Ended
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Dec. 31, 2017
Weighted average basic and diluted number of common shares outstanding [abstract] |
Weighted average basic and diluted number of common shares outstanding | 14. Weighted average basic and diluted number of common shares outstanding
|  | Year ended |  |  | Year ended |
|  | December 31, |  |  | December 31, |
|  | 2017 |  |  | 2016 |
Basic weighted average number of shares |  |  | 40,194,660 |  |  |  | 34,526,435 |
Effect of dilutive stock options and warrants |  |  | - |  |  |  | - |
Diluted weighted average number of shares |  |  | 40,194,660 |  |  |  | 34,526,435 |
Diluted weighted average number of common shares for the year ended December 31, 2017 excludes 2,316,264 (2016: 1,770,765) anti-dilutive stock options and 5,167,391 (2016: 6,862,508) anti-dilutive warrants.

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