Annual report pursuant to Section 13 and 15(d)

Shareholders' Equity - Common Stock Activity (Details)

v3.20.4
Shareholders' Equity - Common Stock Activity (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Increase (Decrease) in Stockholders' Equity      
Balance (in shares) 111,798,000 85,500,000  
Balance $ 298,600 $ 135,717 $ 177,922
Issue of common shares 200,000 236,747  
Share issue costs (12,268) (13,629)  
Issued pursuant to exercise of warrants $ 1 $ 6,988 $ 3,071
Issued pursuant to exercise of stock options (in shares) 1,593,000 3,578,000 276,000
Issued pursuant to exercise of stock options $ 6,643 $ 13,748 $ 943
Balance $ 407,750 $ 298,600 $ 135,717
Balance (in shares) 126,725,000 111,798,000 85,500,000
Common Shares      
Increase (Decrease) in Stockholders' Equity      
Balance (in shares) 111,798,000 85,500,000 84,052,000
Balance $ 746,487 $ 488,744 $ 483,294
Issuance of common shares (in shares) 13,333,000 19,735,000  
Issue of common shares $ 200,000 $ 236,747  
Share issue costs $ (12,268) $ (13,629)  
Issued pursuant to exercise of warrants (in shares) 1,000 2,983,000 1,172,000
Issued pursuant to exercise of warrants $ 2 $ 12,428 $ 3,977
Issued pursuant to exercise of stock options (in shares) 1,593,000 3,580,000 276,000
Issued pursuant to exercise of stock options $ 10,107 $ 22,197 $ 1,473
Balance $ 944,328 $ 746,487 $ 488,744
Balance (in shares) 126,725,000 111,798,000 85,500,000
Common Shares | Public Offering      
Increase (Decrease) in Stockholders' Equity      
Issuance of common shares (in shares)   12,782,000  
Issue of common shares   $ 191,737  
Common Shares | At-the-Market Facilities      
Increase (Decrease) in Stockholders' Equity      
Issuance of common shares (in shares)   6,953,000  
Issue of common shares   $ 45,010