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Net Income (Loss) per Common Share - Narrative (Details) - shares
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Potential shares of common stock attributable to stock options excluded from net income per common share calculation (in shares) 0  
Restricted Stock Units    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Potential shares of common stock attributable to stock options excluded from net income per common share calculation (in shares)   153,442