Income Taxes - Summary of Net Deferred Tax Asset Not Recognized (Detail) - CAD ($)
$ in Thousands |
Dec. 31, 2017 |
Dec. 31, 2016 |
| Share and debt issuance costs [member] |
|
|
| Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
|
|
| Net deferred tax asset not recognized |
$ 2,834
|
$ 1,085
|
| Losses carried forward [member] |
|
|
| Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
|
|
| Net deferred tax asset not recognized |
7,814
|
3,833
|
| Other investments [member] |
|
|
| Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
|
|
| Net deferred tax asset not recognized |
|
6
|
| Property, plant and equipment [member] |
|
|
| Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
|
|
| Net deferred tax asset not recognized |
$ 684
|
|
| Equity accounted investments [member] |
|
|
| Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
|
|
| Net deferred tax asset not recognized |
|
$ 89
|