Share-based compensation(Tables)

12 Months Ended

Dec. 31, 2016

Share-based Compensation [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

Details of the stock option transactions for the years ended December 31, 2016 and 2015 are summarized as follows:

					Weighted
			Weighted		average		Aggregate
			average		remaining		intrinsic
			exercise price		contractual life		value
	Number		(CAD$)		(years)		(CAD$)
Outstanding as at December 31, 2014		1,278,290		4.68		3.34		8,411
Options granted		382,900		10.84
Options exercised		(129,236)		3.76
Options forfeited		(45,097)		8.76
Options expired		(14,260)		41.69
Outstanding as at December 31, 2015		1,472,597		5.88		2.88		8,024
Options granted		617,500		5.97
Options forfeited		(72,200)		4.94
Options expired		(16,340)		20.22
Outstanding as at December 31, 2016		2,001,557		5.82		2.72		1,110
Exercisable as at December 31, 2016		1,292,969		5.20		2.13		1,004

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

At December 31, 2016, stock options to executive officers and directors, employees and consultants were outstanding as follows:

	Options outstanding						Options exercisable
			Weighted		Weighted				Weighted
			average		average				average
			remaining		exercise				exercise
Range of			contractual		price				price
exercise prices (CAD$)	Number		life (years)		(CAD$)		Number		(CAD$)
$1.65 to $2.08		409,000		1.02		1.67		358,568		1.67
$2.09 to $5.63		454,683		1.68		3.78		430,983		3.71
$5.64 to $7.37		550,000		4.47		6.20		106,932		6.20
$7.38 to $13.09		587,874		3.07		9.92		396,486		9.74
		2,001,557		2.72		5.82		1,292,969		5.20

Schedule Of Nonvested Option Activity [Table Text Block]

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		Weighted average
	of		grant-date fair value
Non-vested options	options		(U.S.$)
Non-vested at December 31, 2015		512,784		3.96
Granted		617,500		2.00
Vested		(417,744)		2.56
Forfeited		(3,952)		2.35
Non-vested at December 31, 2016		708,588		2.27

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

The estimated fair value of the stock options granted was determined using the Black-Scholes option pricing model with the following weighted-average assumptions:

	December 31,			December 31,
	2016			2015
Dividend yield		-			-
Expected volatility		65.7	%		78.4	%
Risk-free interest rate		0.7	%		0.6	%
Expected average life of the options		3.1 years			3.4 years
Estimated forfeiture rate		-			-

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

Details of RSU transactions for the year ended December 31, 2016 are summarized as follows:

			Weighted		Weighted
			average		average		Aggregate
			grant date		remaining		intrinsic
			fair value		contractual		value
	Number		(USD$)		life (years)		(USD$)
Outstanding as at December 31, 2015		132,108	$	8.91		2.16	$	1,058
RSUs granted		50,782		4.43				218
RSUs vested		(49,682)		9.03				205
RSUs forfeited		(13,505)		9.00
Outstanding as at December 31, 2016		119,703	$	6.95		1.71	$	334