Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Derivative liability - Additional Information (Details)

v3.20.1
Derivative liability - Additional Information (Details)
12 Months Ended
Dec. 31, 2019
USD ($)
$ / shares
shares
Derivative Liability [Line Items]  
Number of shares issued as result of warrants exercised | shares 646,300
Exercise price of warrants | $ / shares $ 4.25
Issue costs allocated to derivative liability | $ $ 0
Warrants issuance price per share | $ / shares $ 0.50
Warrants price per share | $ / shares $ 0.32
Warrants one  
Derivative Liability [Line Items]  
Number of warrants expired | shares 625,000
Warrants expired | $ $ 15
Warrants two  
Derivative Liability [Line Items]  
Number of warrants expired | shares 25,000
Warrants expired | $ $ 24