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Subsequent Events (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 8 Months Ended 12 Months Ended
Jan. 31, 2022
Dec. 28, 2021
Jan. 22, 2021
Nov. 30, 2020
Oct. 05, 2020
Jun. 05, 2020
Mar. 31, 2022
Jan. 31, 2022
Apr. 01, 2022
Dec. 31, 2020
Dec. 31, 2021
Dec. 14, 2021
Dec. 31, 2019
Subsequent Event [Line Items]                          
Issue of common shares (in shares)   13,333,333 27,058,823 5,000,000 25,943,396 23,076,923       54,020,319      
Sale of stock, price per share   $ 2.25                      
Issued and fully paid share capital                   $ 11.0 $ 13.8    
Issued shares (in shares)                   110,159,352 137,218,175   56,139,033
Common stock, par or nominal value (in dollars per share)                     $ 0.10 $ 0.05  
Subsequent Event                          
Subsequent Event [Line Items]                          
Proceeds from issuance of private placement               $ 30.0          
Increase in share capital $ 1.3                        
Issued and fully paid share capital $ 15.1             $ 15.1          
Issued shares (in shares) 150,551,508           152,073,452 150,551,508          
Common stock, par or nominal value (in dollars per share) $ 0.10             $ 0.10          
Subsequent Event | At-The-Market Offering                          
Subsequent Event [Line Items]                          
Number of shares sold in transaction (in shares)             1,521,944   1,521,944        
Sale of stock, consideration received on transaction             $ 5.2   $ 5.2