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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

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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 + Details
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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 + Details
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