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

Share capital - Disclosure of warrants (Details)

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Share capital - Disclosure of warrants (Details) - USD ($)
shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Reconciliation of warrants issued [Abstract]    
Equity, opening balance $ 112,575 $ 165,821
Warrants exercised 40,507 3,071
Equity, closing balance $ 273,516 $ 112,575
Warrants    
Reconciliation of number of warrants issued [Abstract]    
Number of warrants issued, opening balance 0 1,172
Warrants exercised (1,172)  
Number of warrants issued, closing balance   0
Reconciliation of warrants issued [Abstract]    
Equity, opening balance $ 0 $ 906
Warrants exercised (906) (906)
Equity, closing balance $ 0 $ 0