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Share capital (Tables)

12 Months Ended

Dec. 31, 2017

Disclosure of classes of share capital [abstract]

Schedule of Share Capital

		December 31,				December 31,
		2017				2016
Issued
41,496,950 (2016: 39,540,384) common shares		$	207,012			$	202,191

Schedule of Changes in Company's Outstanding Stock Options

A summary of changes in the Company’s outstanding stock options is presented below:

						December 31,								December 31,
						2017								2016
						Weighted								Weighted
						average								average
						exercise								exercise
		Number				price				Number				price
		(thousands)				CAD				(thousands)				CAD
Balance, beginning of year			1,771			$	4.64				1,516			$	9.50
Granted			1,058				3.86				808				2.09
Exercised			(261	)			3.22				(93	)			3.12
Expired			(252	)			17.31				(460	)			16.50
Balance, end of year			2,316			$	3.06				1,771			$	4.64

Schedule of Stock Options Outstanding and Exercisable

The following table summarizes information on stock options outstanding and exercisable as at December 31, 2017:

			Weighted
			average								Weighted								Weighted
			remaining								average								average
	Exercise		contractual								exercise								exercise
	price		life				Outstanding				price				Exercisable				price
	CAD		(years)				(thousands)				CAD				(thousands)				CAD
	2.00 to 3.00			0.78				1,163			$	2.14				899			$	2.17
	3.01 to 4.00			2.07				1,050				3.85				350				3.85
	4.01 to 5.00			1.75				25				4.59				14				4.63
	5.01 to 6.00			0.41				78				5.65				78				5.65
								2,316			$	3.06				1,341			$	2.84

Fair Value Weighted Average Assumptions

The Company used the Black-Scholes Option Pricing Model to estimate fair value using the following weighted-average assumptions:

		Year ended				Year ended
		December 31,				December 31,
		2017				2016
Expected stock price volatility (1)			83	%			83	%
Risk free interest rate			0.87	%			0.47	%
Expected life		3 years				3 years
Expected forfeiture rate			4.18	%			4.97	%
Expected dividend yield			0	%			0	%
Share-based payments included in cost of sales		$	-			$	19
Share-based payments included in general and
administrative expenses			1,491				566
Total share-based payments		$	1,491			$	585

Warrants Issued and Outstanding

The warrants that are issued and outstanding as at December 31, 2017 are as follows:

Number of	Exercise	Issuance	Expiry
warrants	price (CAD)	date	date
742,883	4.68	Jul 2016	Jun 14, 2021
224,728	4.20	Jul 2016	Jun 14, 2018
1,350,204	4.68	Jun 2016	Jun 9, 2021
388,886	4.20	Jun 2016	Jun 9, 2018
1,537,355	1.20	Feb 2016	Feb 10, 2019
307,777	1.20	Nov 2015	Nov 10, 2018
29,166	1.56	Aug 2015	Aug 26, 2018
190,906	3.00	Aug 2015	Aug 26, 2018
395,486	1.56	May 2015	May 27, 2018
5,167,391

X

- Definition

The description of inputs to the option pricing model for share options granted. [Refer: Option pricing model [member]]

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