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Shareholders' equity and capital stock (Details 5) (CAD)
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12 Months Ended | ||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Number of unvested options | 826,425 | 276,365 | 0 |
| Weighted- average remaining amortization life (years) | 1 year 3 months 26 days | ||
| Aggregate Intrinsic Value | 685,933 | ||
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Grant Date One [Member]
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| Grant date | Jan. 28, 2011 | ||
| Number of unvested options | 133,147 | ||
| Weighted- average remaining amortization life (years) | 9 months 18 days | ||
| Aggregate Intrinsic Value | 110,512 | ||
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Grant Date Two [Member]
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| Grant date | Jan. 12, 2012 | ||
| Number of unvested options | 288,618 | ||
| Weighted- average remaining amortization life (years) | 1 year 11 days | ||
| Aggregate Intrinsic Value | 239,553 | ||
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Grant Date Three [Member]
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| Grant date | Dec. 07, 2012 | ||
| Number of unvested options | 404,660 | ||
| Weighted- average remaining amortization life (years) | 1 year 11 months 5 days | ||
| Aggregate Intrinsic Value | 335,868 |
| X | ||||||||||
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- Definition
Restricted stock units issuance date for equity-based awards excluding options. No definition available.
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| X | ||||||||||
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- Definition
The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The total fair value of equity-based awards for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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