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Basic and Diluted Earnings Per Common Share
 9 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Earnings Per Share [Abstract]    
Basic and Diluted Earnings Per Common Share
7. Basic and Diluted Earnings Per Common Share

 

Basic net loss per share is calculated by dividing net loss by the weighted-average number of common shares outstanding during the period, without consideration of potential common shares. Diluted net loss per share is calculated by dividing net loss by the weighted-average number of common shares outstanding plus potential common shares. Stock options, restricted stock units, and other convertible securities are considered potential common shares and are included in the calculation of diluted net loss per share using the treasury method when their effect is dilutive. Options, restricted stock units and convertible preferred stock representing approximately 239,000 and 249,000 shares of common stock were excluded from the computations of diluted net loss per common share for the three and nine months ended September 30, 2020 and 2019, respectively, as their effect was anti-dilutive.
10. Basic and Diluted Earnings Per Common Share

 

Basic net loss per share is calculated by dividing net loss by the weighted-average number of common shares outstanding during the period, without consideration of potential common shares. Diluted net loss per share is calculated by dividing net loss by the weighted-average number of common shares outstanding plus potential common shares. Stock options, restricted stock units, and other convertible securities are considered potential common shares and are included in the calculation of diluted net loss per share using the treasury method when their effect is dilutive. Options, restricted stock units and convertible preferred stock representing approximately 210,000 and 219,000 shares of common stock were excluded from the computations of diluted net loss per common share for the years ended December 31, 2019 and 2018, respectively, as their effect was anti-dilutive.