Share Capital (Tables)

12 Months Ended

Dec. 31, 2016

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Stock-based Compensation, Stock Options, Activity

Summary of stock option activity is as follows: 

	Number of			Weighted Average Exercise Price				Aggregate
	Options			CAD $		U.S. $		IntrinsicValue
Outstanding, January 1, 2014		1,333,099			3.98		3.88		8,300
Granted		205,170			10.84		9.35
Exercised		(2,417	)		6.07		5.23		23
Forfeited, cancelled or expired		(51,634	)		5.96		5.14
Outstanding, December 31, 2014		1,484,218			4.88		4.20		15,551
Granted		529,288			18.73		14.67
Exercised		(270,254	)		4.66		3.65		2,426
Forfeited, cancelled or expired		(21,780	)		11.21		8.78
Outstanding, December 31, 2015		1,721,472			9.62		6.95		1,880
Granted		323,794			9.79		7.39
Exercised(1)		(121,292	)		3.67		2.77		568
Forfeited, cancelled or expired		(13,151	)		14.98		11.31
Outstanding, December 31, 2016		1,910,823			9.84		7.32		4,464
Exercisable, December 31, 2016		1,292,012			7.77		5.78		4,351

(1) During the year ended December 31, 2016, 47,413 (2015 - 70,438) stock options were exercised for the same number of common shares in exchange for cash. In the same period, the Company issued 47,841 (2015 - 133,565) common shares for the cashless exercise of 73,879 (2015 - 199,816) stock options.

Summary of Stock Option Outstanding and Exercisable

The following table summarizes the stock options outstanding and exercisable at December 31, 2016:

	Options Outstanding								Options Exercisable
Range of Exercise Prices	Number of Options Outstanding		Weighted Average Remaining Contractual Life		Weighted Average Exercise Price				Number of Options Exercisable		WeightedAverage Exercise Price
			(years)		CAD $		U.S. $				CAD $		U.S. $
$1.93 - $2.31		228,570		4.90		2.67		1.99		227,222		2.67		1.99
$2.32 - $4.86		615,475		2.98		3.74		2.78		615,475		3.74		2.78
$4.87 - $7.72		467,592		8.90		9.98		7.42		118,964		10.06		7.48
$7.73 - $7.91		1,200		9.79		10.62		7.90		—		—		—
$7.92 - $17.70		263,116		7.16		12.24		9.10		162,924		11.84		8.81
$17.71 - $18.23		333,800		7.61		23.88		17.76		166,891		23.88		17.76
$18.24 - $21.82		1,070		8.10		26.79		19.92		536		26.85		19.97
		1,910,823		6.05		9.84		7.32		1,292,012		7.77		5.78

Schedule of Nonvested Stock Option Activity

A summary of the Company’s non-vested stock option activity and related information for the year ended December 31, 2016 is as follows:

	Number of Options			Weighted Average Grant Date FairValue
				CAD $		USD $
Non-vested, January 1, 2016		686,896			10.60		8.54
Granted		323,794			6.54		4.94
Vested		(382,491	)		11.15		8.42
Forfeited and cancelled		(9,388	)		10.25		7.73
Non-vested, December 31, 2016		618,811			9.58		7.13

Schedule of Stock-based Payment Award, Stock Options, Valuation Assumptions

The weighted-average option pricing assumptions are as follows:

	Years ended December 31
	2016			2015			2014
Average risk-free interest rate		1.58	%		1.75	%		1.94	%
Expected volatility		75	%		75	%		73	%
Average expected term (in years)		6.22			6.23			6.13
Expected dividend yield		0.00	%		0.00	%		0.00	%
Weighted average fair value of options granted	$	4.94		$	9.83		$	6.10

Stock Based Compensation Expenses

Stock-based compensation expense is classified in the consolidated statements of operations and comprehensive income (loss) as follows:

	Years ended December 31,
	2016		2015		2014
Research and development	$	874	$	624	$	194
General and administrative		1,287		3,105		566
	$	2,161	$	3,729	$	760