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Convertible Debentures - Summary of Detailed Information about Convertible Debentures, Valuation Assumptions (Detail) | 12 Months Ended |  |
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Dec. 31, 2018 CAD ($) | Dec. 31, 2017 CAD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
2016 Debentures [member] |  |  |  |
Convertible debentures [line items] |  |  |  |
Volatility | 38.00% | 39.00% |  |
Expected life in years | 3.56 years | 4.56 years |  |
Risk free interest rate | 2.58% | 2.23% |  |
Expected dividend yield | 0.00% | 0.00% |  |
Credit spread | 25.79% | 25.35% |  |
Underlying share price of the Company | $ 2.41 | $ 3.21 |  |
Conversion exercise price |  |  | $ 2.3261 | $ 2.3261
Exchange rate (C$:US$) | 0.7330 | 0.7971 | 0.7330 | 0.7971
2017 Debentures [member] |  |  |  |
Convertible debentures [line items] |  |  |  |
Volatility | 38.00% | 39.00% |  |
Expected life in years | 3.56 years | 4.56 years |  |
Risk free interest rate | 2.58% | 2.23% |  |
Expected dividend yield | 0.00% | 0.00% |  |
Credit spread | 25.79% | 25.35% |  |
Underlying share price of the Company | $ 2.41 | $ 3.21 |  |
Conversion exercise price |  |  | $ 2.6919 | $ 2.6919
Exchange rate (C$:US$) | 0.7330 | 0.7971 | 0.7330 | 0.7971

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- Definition Historical volatility for shares used as a significant Level 3 unobservable input for liabilities. [Refer: Level 3 of fair value hierarchy [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 13 -IssueDate 2018-01-01 -Paragraph B36 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=13&date=2018-03-01&anchor=para_B36_b&doctype=Appendix&seq=2 -URIDate 2018-03-16 + Details
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