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Convertible Notes - Additional Information (Details) $ / shares in Units, $ / shares in Units, $ in Thousands, $ in Millions |  |  |  |  | 1 Months Ended | 2 Months Ended | 6 Months Ended | 10 Months Ended | 12 Months Ended |  |
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Oct. 22, 2020 USD ($) $ / shares | Sep. 30, 2020 CAD ($) | Jun. 05, 2020 CAD ($) $ / shares shares | Jun. 05, 2020 USD ($) $ / shares shares | Aug. 14, 2019 CAD ($) $ / shares | Jul. 31, 2019 CAD ($) | May 31, 2019 CAD ($) | Dec. 31, 2020 CAD ($) $ / shares shares | Dec. 31, 2020 $ / shares | Dec. 31, 2020 USD ($) shares | Dec. 31, 2018 CAD ($) | Dec. 31, 2020 CAD ($) | Dec. 31, 2019 CAD ($) shares | Dec. 31, 2018 CAD ($) Tranche $ / shares shares | Dec. 31, 2018 USD ($) Tranche $ / shares shares | Jun. 05, 2020 $ / shares | Dec. 31, 2019 USD ($) shares
Disclosure Of Detailed Information Of Convertible Notes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term debt facility amount |  |  | $ 73,200 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured convertible note converted to common shares |  |  | $ 73,200 |  |  |  |  | $ 73,200 |  |  |  | $ 73,227 |  |  |  |  |
Conversion price per common share | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1.00 |
Indebtedness under unsecured convertible notes |  |  |  | $ 3.0 |  |  |  |  |  |  |  |  |  |  |  |  |
Principal balance of secured convertible note convertible to common shares | $ 10.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price | $ / shares | $ 0.1624 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average price of common shares eight consecutive trading days volume, percentage | 92.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of outstanding common shares | 9.99% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average conversion price | $ / shares |  |  |  |  |  |  |  | $ 0.2468 |  |  |  |  |  |  |  |  |
Issuance of common shares | shares |  |  |  |  |  |  |  | 296,700,000 |  |  |  |  |  |  |  |  |
Unsecured senior subordinated convertible notes convertible to common shares |  |  |  | $ 18.0 |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase warrants to acquire common shares | shares |  |  | 14,500,000 | 14,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Initial exercise price of common share | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.9338 |
Proceeds from closure of private placement |  |  |  |  |  |  |  |  |  |  | $ 27,764 | $ 18,070 | $ 90,373 |  |  |  |
Issue of convertible notes |  |  |  |  |  |  |  |  |  |  | $ 3,232 |  |  |  |  |  |
Convertible debt converted into shares |  |  |  |  | $ 6,900 |  |  |  |  |  |  |  |  |  |  |  |
Conversion of debt conversion price | $ / shares |  |  |  |  | $ 13.84 |  |  |  |  |  |  |  |  |  |  |  |
Percentage of debt converted into shares |  |  |  |  | 80.00% |  |  |  |  |  |  |  |  |  |  |  |
Number of closed tranches of private placement | Tranche |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 | 3 |  |
Private placement of note, percentage |  |  |  |  |  |  |  |  |  |  |  |  |  | 12.00% | 12.00% |  |
Proceeds from private placement of notes |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 28,900 |  |  |
Number of each convertible into units consisting of common shares | shares |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.6 | 1.6 |  |
Number of each convertible into units consisting of common share purchase warrant | shares |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.8 | 0.8 |  |
Convertible notes maturing period |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 months | 12 months |  |
Convertible notes allocated to equity |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,200 |  |  |
Convertible notes, principal amount |  |  |  |  |  |  |  |  |  |  |  |  | 21,200 |  |  |  | $ 2.5
Convertible notes, principal amount repaid to unit holders |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,000 |  |  |  | $ 2.4
Convertible Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information Of Convertible Notes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  |  |  |  |  |  | 12.00% |  |  | 12.00% | 12.00% |  |
Issue of convertible notes |  |  |  |  |  |  |  |  |  |  | $ 3,232 |  |  |  |  |  |
Interest rate payable, percent |  |  |  |  |  |  |  |  |  |  | 12.00% |  |  | 12.00% | 12.00% |  |
Directors and Officers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information Of Convertible Notes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issue of convertible notes |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,000 |  |  |
Agent Warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information Of Convertible Notes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase warrants to acquire common shares | shares |  |  | 1,080,000 | 1,080,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Initial exercise price of common share | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1.00 |
Ordinary Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information Of Convertible Notes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity units issued | shares |  |  |  |  |  |  |  |  |  |  |  |  | 6,200,000 |  |  |  | 6,200,000
Warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information Of Convertible Notes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity units issued | shares |  |  |  |  |  |  |  |  |  |  |  |  | 3,600,000 |  |  |  | 3,600,000
Top of Range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information Of Convertible Notes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase warrants to acquire common shares amount |  |  | $ 17,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price per warrant | $ / shares |  |  |  | $ 1.00 |  |  |  |  |  |  |  |  |  |  |  |  |
Indebtedness under unsecured convertible notes |  | $ 3,000 | 3,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common share purchase warrant holding period |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 months | 12 months |  |
Secured Convertible Note Warrants | Top of Range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information Of Convertible Notes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase warrants to acquire common shares amount |  |  | $ 17,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price per warrant | $ / shares |  |  |  | $ 1.20 |  |  |  |  |  |  |  |  |  |  |  |  |
Secured Convertible Note |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information Of Convertible Notes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity |  |  | June 5, 2022 | June 5, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Issue of convertible notes |  |  | $ 73,200 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unsecured Convertible Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information Of Convertible Notes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured convertible note converted to common shares |  |  |  |  |  |  |  |  |  | $ 18.0 |  |  |  |  |  |  |
Maturity |  |  | June 5, 2022 | June 5, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price | $ / shares |  |  | $ 0.1624 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of outstanding common shares |  |  | 9.99% | 9.99% |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average conversion price | $ / shares |  |  |  |  |  |  |  |  | $ 0.2348 |  |  |  |  |  |  |  |
Issuance of common shares | shares |  |  |  |  |  |  |  |  |  | 76,700,000 |  |  |  |  |  |  |
Weighted average price of common shares five consecutive trading days lowest volume, percentage |  |  | 88.00% | 88.00% |  |  |  |  |  |  |  |  |  |  |  |  |
8% Senior Unsecured Convertible Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information Of Convertible Notes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  |  | 8.00% |  |  |  |  |  |  |  |  |  |
Proceeds from closure of private placement |  |  |  |  |  |  | $ 92,600 |  |  |  |  |  |  |  |  |  |
Issue of convertible notes |  |  |  |  |  | $ 600 |  |  |  |  |  |  | $ 93,192 |  |  |  |
Interest rate payable, percent |  |  |  |  |  |  | 8.00% |  |  |  |  |  |  |  |  |  |
8% Senior Unsecured Convertible Notes | Directors and Officers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information Of Convertible Notes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issue of convertible notes |  |  |  |  |  | $ 100 |  |  |  |  |  |  |  |  |  |  |
CAD Offering |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information Of Convertible Notes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from private placement of notes |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 22,200 |  |  |
USD Offering |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information Of Convertible Notes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from private placement of notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5.0 |  |
CAD Denominated Convertible Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information Of Convertible Notes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Offering convertible price per unit | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3.91 |  |  |
USD Denominated Convertible Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information Of Convertible Notes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Offering convertible price per unit | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3.13 |  |

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