The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

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Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 2
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Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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Share-based compensation (Details 1) - Share Compensation Plan [Member] - CAD / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding, Number	2,001,557	1,472,597	1,278,290
Options outstanding, Weighted average remaining contractual life	2 years 8 months 19 days
Options outstanding, Weighted average exercise price	CAD 5.82	CAD 5.88	CAD 4.68
Options exercisable, Number	1,292,969
Options exercisable, Weighted average exercise price	CAD 5.20
$1.65 to $2.08 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, minimum	1.65
Range of exercise prices, maximum	CAD 2.08
Options outstanding, Number	409,000
Options outstanding, Weighted average remaining contractual life	1 year 7 days
Options outstanding, Weighted average exercise price	CAD 1.67
Options exercisable, Number	358,568
Options exercisable, Weighted average exercise price	CAD 1.67
$2.09 to $5.63 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, minimum	2.09
Range of exercise prices, maximum	CAD 5.63
Options outstanding, Number	454,683
Options outstanding, Weighted average remaining contractual life	1 year 8 months 5 days
Options outstanding, Weighted average exercise price	CAD 3.78
Options exercisable, Number	430,983
Options exercisable, Weighted average exercise price	CAD 3.71
$5.64 to $7.37 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, minimum	5.64
Range of exercise prices, maximum	CAD 7.37
Options outstanding, Number	550,000
Options outstanding, Weighted average remaining contractual life	4 years 5 months 19 days
Options outstanding, Weighted average exercise price	CAD 6.20
Options exercisable, Number	106,932
Options exercisable, Weighted average exercise price	CAD 6.20
$7.38 to $13.09 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, minimum	7.38
Range of exercise prices, maximum	CAD 13.09
Options outstanding, Number	587,874
Options outstanding, Weighted average remaining contractual life	3 years 25 days
Options outstanding, Weighted average exercise price	CAD 9.92
Options exercisable, Number	396,486
Options exercisable, Weighted average exercise price	CAD 9.74