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Common Shares - Anti-dilutive (Details) - shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Stock Options [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive shares outstanding 50,000 1,437,000
Restricted Stock Units (RSUs) [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive shares outstanding   1,491,301
Deferred Stock Units (DSU) [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive shares outstanding   366,000