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Convertible Debentures - Additional Information (Detail) |  |  | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 21, 2017 CAD ($) shares | Jul. 21, 2017 USD ($) shares | Jun. 10, 2016 CAD ($) shares | Jun. 10, 2016 USD ($) shares | Dec. 31, 2018 CAD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 CAD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Jul. 21, 2017 USD ($) | Dec. 31, 2016 CAD ($) | Jun. 10, 2016 USD ($)
Convertible debentures [line items] |  |  |  |  |  |  |  |  |  |  |  |
Convertible debenture issuance costs |  |  |  |  |  |  | $ 2,811,146 |  |  |  |  |
Establishment fee, percent | 3.00% | 3.00% |  |  |  |  |  |  |  |  |  |
Mark to market loss (gain) on convertible debentures |  |  |  |  | $ 32,578,261 |  | $ (27,522,985) |  |  |  |  |
Interest rate |  |  |  |  | 7.50% |  | 7.50% | 7.50% | 7.50% |  |  |
Borrowings, interest rate, payable in cash |  |  |  |  |  |  | 5.00% |  | 5.00% |  |  |
Borrowings, interest rate, payable in common shares |  |  |  |  |  |  | 2.50% |  | 2.50% |  |  |
2016 Debentures [member] |  |  |  |  |  |  |  |  |  |  |  |
Convertible debentures [line items] |  |  |  |  |  |  |  |  |  |  |  |
Gross proceeds from issuance of convertible debentures |  |  | $ 76,416,000 | $ 60,000,000 |  |  |  |  |  |  |  |
Net proceeds from issuances of convertible debentures |  |  | 72,363,602 | 56,852,383 |  |  |  |  |  |  |  |
Convertible debenture issuance costs |  |  | $ 4,052,398 | $ 3,147,617 |  |  |  |  |  |  |  |
Establishment fee, percent |  |  | 3.00% | 3.00% |  |  |  |  |  |  |  |
Establishment fee |  |  | $ 2,292,480 | $ 1,800,000 |  |  |  |  |  |  |  |
Establishment fee (shares) | shares |  |  | 1,005,586 | 1,005,586 |  |  |  |  |  |  |  |
Convertible debentures at fair value |  |  | $ 74,123,520 |  | $ 72,481,375 |  | $ 90,742,373 | $ 53,131,047 | $ 72,333,498 |  | $ 70,811,801 | $ 58,200,000
Gains (losses) recognised in profit or loss, fair value measurement, liabilities |  |  |  |  | 18,260,998 | $ 19,202,451 |  |  |  |  |  |
Convertible debt, conversion price |  |  |  |  |  |  |  | 2.3261 | 2.3261 |  |  |
2017 Debentures [member] |  |  |  |  |  |  |  |  |  |  |  |
Convertible debentures [line items] |  |  |  |  |  |  |  |  |  |  |  |
Gross proceeds from issuance of convertible debentures | $ 75,294,000 | $ 60,000,000 |  |  |  |  |  |  |  |  |  |
Net proceeds from issuances of convertible debentures | 72,482,854 | 57,759,864 |  |  |  |  |  |  |  |  |  |
Convertible debenture issuance costs | $ 2,811,146 | $ 2,240,136 |  |  |  |  |  |  |  |  |  |
Establishment fee, percent | 3.00% | 3.00% |  |  |  |  |  |  |  |  |  |
Establishment fee | $ 2,258,820 | $ 1,800,000 |  |  |  |  |  |  |  |  |  |
Establishment fee (shares) | shares | 869,271 | 869,271 |  |  |  |  |  |  |  |  |  |
Convertible debentures at fair value | $ 73,035,180 |  |  |  | 65,709,509 |  | 80,627,593 | 48,167,064 | 64,270,700 | $ 58,200,000 | $ 73,035,180 |
Gains (losses) recognised in profit or loss, fair value measurement, liabilities |  |  |  |  | 14,918,084 | $ 16,103,636 |  |  |  |  |  |
Mark to market gain related to the change in fair value |  |  |  |  | 33,179,082 |  | 27,522,985 |  |  |  |  |
Mark to market loss (gain) on convertible debentures |  |  |  |  | (32,578,261) |  | 27,522,985 |  |  |  |  |
Mark to market gain loss on convertible debentures in other comprehensive income |  |  |  |  | $ 600,821 |  | $ 0 |  |  |  |  |
Convertible debt, conversion price |  |  |  |  |  |  |  | $ 2.6919 | $ 2.6919 |  |  |

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