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Earnings (Loss) Per Share
9 Months Ended
Sep. 30, 2021
Earnings Per Share [Abstract]  
Earnings (Loss) Per Share Earnings (Loss) Per Share
Basic earnings (loss) per common share is calculated by dividing net income (loss) by the weighted average number of common shares outstanding for the period. Diluted earnings (loss) per common share is calculated by dividing net income (loss) by the weighted average number of common shares outstanding combined with dilutive common share equivalents outstanding, if the effect is dilutive. The three months ended September 30, 2021 diluted earnings per common share included 851,702 common share equivalents.
Potentially dilutive securities were excluded from the calculation of diluted loss per share for the nine months ended September 30, 2021 and for the three and nine months ended September 30, 2020, since including them would have an anti-dilutive effect on loss per share due to the net loss incurred during the periods.