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Loss per Common Share - Additional Information (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Earnings Per Share [Abstract]        
Anti-dilutive shares excluded from calculation of diluted earnings per share (in shares) 2,222,118 2,737,679 2,377,628 2,698,524