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Income taxes (Details) CAD in Thousands	12 Months Ended
	Dec. 31, 2015 CAD provincial_jurisdiction	Dec. 31, 2016 CAD
Operating Loss Carryforwards [Line Items]
Number of provincial jurisdictions | provincial_jurisdiction	3
Non-capital losses for income tax purposes		CAD 52,556
Capital loss carryforward
Operating Loss Carryforwards [Line Items]
Valuation allowance, amount	CAD 1,035	CAD 1,035

X

- Definition

Number of Provincial Income Taxing Jurisdictions

+ References

No definition available.

+ Details

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- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319

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- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32559-109319

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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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