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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