Registration statement for securities of certain foreign private issuers

Warrant Liability - Summary of Warrant Liability (Detail)

v3.20.1
Warrant Liability - Summary of Warrant Liability (Detail)
 3 Months Ended 12 Months Ended
Mar. 31, 2020
USD ($)
shares
Mar. 31, 2020
CAD ($)
shares
Mar. 31, 2019
USD ($)
shares
Dec. 31, 2019
USD ($)
shares
Dec. 31, 2019
CAD ($)
shares
Dec. 31, 2018
USD ($)
shares
Dec. 31, 2018
CAD ($)
shares
Disclosure of classes of share capital [line items]              
Number of Warrants, Opening Balance | shares 21,203,411 21,203,411 13,901,859 13,901,859 13,901,859 4,933,231 4,933,231
Number of Warrants, exercised | shares (2,400,000) (2,400,000)   (1,018,506) (1,018,506) (6,500) (6,500)
Number of Warrants, expired | shares   (135,824) (135,824)    
Number of Warrants, Ending Balance | shares 22,303,411 22,303,411   21,203,411 21,203,411 13,901,859 13,901,859
Warrant liability, Opening Balance $ 3,621,444   $ 11,250,167 $ 11,250,167   $ 17,849,460  
Warrant liability, exercised (555,120)     (3,742,824)   (28,949)  
Warrant liability, expired       0   0  
Warrant liability, Foreign exhange adjustment during the year 51,091   106,057 (17,687)   984,462  
Warrant liability, Fair value adjustment during the year 1,117,476   $ (10,476,625) 19,800,645   17,095,220  
Warrant liability, Ending Balance $ 2,373,057     $ 3,621,444   $ 11,250,167  
Issue of warrants expiring, March 21, 2024 [Member]              
Disclosure of classes of share capital [line items]              
Number of Warrants, issued | shares       8,455,882 8,455,882    
Warrants issued         $ 15,897,059    
Issue of warrants expiring, August 10, 2023 [member]              
Disclosure of classes of share capital [line items]              
Number of Warrants, expiring | shares           7,679,574 7,679,574
Warrant liability, expiring             $ 6,297,251
Issue of warrants expiring, April 10, 2023 [member]              
Disclosure of classes of share capital [line items]              
Number of Warrants, expiring | shares           1,295,554 1,295,554
Warrant liability, expiring             $ 5,212,087
Issue of warrants expiring, March 27, 2025 [member]              
Disclosure of classes of share capital [line items]              
Number of Warrants, issued | shares 3,500,000 3,500,000          
Warrants issued   $ 475,300