Annual reports filed by certain Canadian issuers pursuant to Section 15(d) and Rule 15d-4

WARRANT LIABILITY - Summary of Warrant Liability (Detail)

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WARRANT LIABILITY - Summary of Warrant Liability (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Disclosure of classes of share capital [line items]    
Number of Warrants, Opening Balance 21,203,411 13,901,859
Number of Warrants, exercised (7,257,252) (1,018,506)
Number of Warrants, expired (233,740) (135,824)
Number of Warrants, Ending Balance 38,787,441 21,203,411
Warrant liability, Opening Balance $ 3,621,444 $ 11,250,167
Warrant liability, exercised (5,948,771) (3,742,824)
Warrant liability, expired (26,198)
Warrant liability, Foreign exchange adjustment during the period 95,631 17,687
Warrant liability, Fair value adjustment during the period 27,855,678 (19,800,645)
Warrant liability, Ending Balance $ 36,316,681 $ 3,621,444
Issue of warrants expiring, March 21, 2024 [Member]    
Disclosure of classes of share capital [line items]    
Number of Warrants, expired   8,455,882
Warrant liability, issued   $ 15,897,059
Issue of warrants expiring, March 27, 2025 [Member]    
Disclosure of classes of share capital [line items]    
Number of Warrants, expired 3,500,000  
Warrant liability, issued $ 475,300  
Issue of warrants expiring, November 6, 2025 [Member]    
Disclosure of classes of share capital [line items]    
Number of Warrants, expired 2,757,252  
Warrant liability, issued $ 508,200  
Issue of warrants expiring, June 10, 2024 [Member]    
Disclosure of classes of share capital [line items]    
Number of Warrants, expired 9,000,000  
Warrant liability, issued $ 9,709,200