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Derivative Warrant Liabilities - Unsecured Convertible Note Warrants - Additional Information (Details) $ / shares in Units, $ in Millions |  | 2 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jun. 05, 2020 $ / shares | Dec. 31, 2020 shares | Dec. 31, 2020 CAD ($) shares $ / shares
Disclosure Of Detailed Information About Derivative Warrant Liability [Line Items] |  |  |
Issuance of common shares |  | 296,700,000 |
Warrants outstanding |  | 2,080,000 | 2,080,000
Unsecured Convertible Notes Warrants |  |  |
Disclosure Of Detailed Information About Derivative Warrant Liability [Line Items] |  |  |
Warrants description | The Unsecured Convertible Notes Warrants were issued on June 5, 2020, are immediately exercisable, and expire 42 months from the date that the underlying common shares become freely tradeable, which was July 16, 2020. |  |
Warrants expiration period | 42 months |  |
Weighted average exercise price of warrants | $ / shares | $ 0.1766 |  | $ 0.1766
Warrants exercised |  |  | 14,000,000
Weighted average exercise price of warrants | $ / shares | 0.1766 |  | $ 0.1766
Issuance of common shares |  |  | 14,000,000
Gross proceeds from exercise of warrants | $ |  |  | $ 3.2
Warrants outstanding |  | 500,000 | 500,000
Unsecured Convertible Notes Warrants | Bottom of Range |  |  |
Disclosure Of Detailed Information About Derivative Warrant Liability [Line Items] |  |  |
Weighted average price of common shares | $ / shares | $ 2.8014 |  |

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