XML 158 R111.htm IDEA: XBRL DOCUMENT v3.21.1
Share capital - Additional information (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended 13 Months Ended 15 Months Ended
Sep. 30, 2020
USD ($)
shares
Sep. 30, 2020
CAD ($)
shares
Jun. 25, 2020
USD ($)
shares
Jun. 25, 2020
CAD ($)
shares
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
Sep. 30, 2020
USD ($)
Dec. 31, 2020
shares
Sep. 30, 2020
$ / shares
Jun. 25, 2020
$ / shares
Sep. 26, 2019
USD ($)
Disclosure of classes of share capital [line items]                      
Issuance of common shares for cash, net of issuance costs | $         $ 95,992,000 $ 40,066,000          
ATM Program                      
Disclosure of classes of share capital [line items]                      
Maximum issuance of common shares from treasury, value | $                     $ 125,000,000
Number of shares issued during period (in shares) | shares         8,353,042     14,458,000      
Issuance of common shares for cash, net of issuance costs | $         $ 121,540,000   $ 121,540,000        
Private Placement                      
Disclosure of classes of share capital [line items]                      
Number of shares issued during period (in shares) | shares     384,616 384,616              
Issuance of common shares for cash, net of issuance costs     $ 3,664,000 $ 5,000              
Value of shares issued during period (per share)                   $ 13.00  
Premium value (in dollars per share)                   $ 0.45  
Premium value | $     $ 127,000                
Private Placement 1                      
Disclosure of classes of share capital [line items]                      
Number of shares issued during period (in shares) | shares 435,324 435,324                  
Issuance of common shares for cash, net of issuance costs $ 5,248,000 $ 7,000                  
Value of shares issued during period (per share)                 $ 16.08    
Premium value (in dollars per share)                 2.03    
Private Placement 2                      
Disclosure of classes of share capital [line items]                      
Number of shares issued during period (in shares) | shares 176,160 176,160                  
Issuance of common shares for cash, net of issuance costs $ 2,249,000 $ 3,000                  
Value of shares issued during period (per share)                 17.03    
Premium value (in dollars per share)                 $ 2.98    
September 30 Private Placements                      
Disclosure of classes of share capital [line items]                      
Premium value | $ $ 1,056,000           $ 1,056,000