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Compensation of Key Management Personnel (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
COMPENSATION OF KEY MANAGEMENT PERSONNEL    
Short-term benefits $ 1.8 $ 2.1
Share-based payments 1.3 0.2
Termination benefits 0.0 1.1
Total key management personnel remuneration 3.1 3.4
Contractual capital commitments $ 65.3 $ 72.5