Earnings (Loss) Per Share

12 Months Ended

Dec. 31, 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. Potentially dilutive common share equivalents consist of incremental shares of common stock issuable upon exercise of stock options and settlement of restricted stock units.

Potentially dilutive securities were excluded from the calculation of diluted loss per share for the years ended December 31, 2021 and 2020, since including them would have an anti-dilutive effect on loss per share due to the net loss incurred during the periods. Securities convertible into shares of common stock that were not considered in the diluted loss per share calculations were 1.0 million restricted stock units and 4.3 million stock options for the year ended December 31, 2021, and 1.8 million restricted stock units and 3.8 million stock options for the year ended December 31, 2020.