Consolidated Statement of Shareholders' Equity - USD ($) $ in Thousands	Total		Common Shares [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	[1]
Balance at Dec. 31, 2014	$ 72,779		$ 147,157	$ 30,346	$ (103,734)	$ (990)
Balance (in Shares) at Dec. 31, 2014			14,181,333
Net loss	(15,752)				(15,752)
Stock-based compensation expense	2,077			2,077
Issued pursuant to exercise of stock options	$ 278		$ 1,477	(992)	(207)
Issued pursuant to exercise of stock options (in Shares)	270,254		204,003
Fair value adjustment upon reclassification of stock options (note 3l)	$ 1,652			1,652
Balance at Dec. 31, 2015	61,034		$ 148,634	33,083	(119,693)	(990)
Balance (in Shares) at Dec. 31, 2015			14,385,336
Net loss	(22,997)				(22,997)
Issuance of common shares, net of issuance costs	23,832		$ 23,832
Issuance of common shares, net of issuance costs (in Shares)			3,450,000
Stock-based compensation expense	2,186			2,186
Issued pursuant to exercise of stock options	$ 132		$ 780	(657)	9
Issued pursuant to exercise of stock options (in Shares)	121,292		95,254
Fair value adjustment upon reclassification of stock options (note 3l)	$ (286)			(286)
Balance at Dec. 31, 2016	63,901		$ 173,246	34,326	(142,681)	(990)
Balance (in Shares) at Dec. 31, 2016			17,930,590
Net loss	(30,704)				(30,704)
Stock-based compensation expense	2,460			2,460
Issued pursuant to exercise of stock options	$ 177		$ 595	(415)	(3)
Issued pursuant to exercise of stock options (in Shares)	71,006	[2]	67,830
Issuance of warrants	$ 100			100
Balance at Dec. 31, 2017	$ 35,934		$ 173,841	$ 36,471	$ (173,388)	$ (990)
Balance (in Shares) at Dec. 31, 2017			17,998,420

[1] December 31, 2017, our accumulated other comprehensive loss is entirely related to historical cumulative translation adjustments from the application of U.S. dollar reporting when the functional currency of the Company was the Canadian dollar as described in note 3m.

[2] During the year ended December 31, 2017, 63,425 (2016 – 47,413) stock options were exercised for the same number of common shares in exchange for cash. In the same period, the Company issued 4,405 (2016 – 47,841) common shares for the cashless exercise of 7,581 (2016 – 73,879) stock options.