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Share Capital - Equity Raises - Summary of Equity Financing (Parenthetical) (Details) - CAD ($) $ in Thousands | Feb. 07, 2018 | Nov. 02, 2017 | Jul. 21, 2017 | Mar. 22, 2017 | Dec. 22, 2016 | Aug. 24, 2016 | Apr. 15, 2016
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Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items] |  |  |  |  |  |  |
Equity financing issue costs | $ 8,615 |  | $ 78 | $ 90 | $ 3,886 | $ 2,407 | $ 707
Greenstar investment |  |  |  |  |  |  |
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items] |  |  |  |  |  |  |
Equity financing issue costs |  | $ 707 |  |  |  |  |

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