Net Loss Per Common Share

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Net Loss Per Common Share

4. Net Loss Per Common Share

Basic and diluted net loss per common share is determined by dividing net loss attributable to common stockholders by the weighted-average common shares outstanding during the period. For all periods presented, the common shares underlying the options and warrants have been excluded from the calculation because their effect would be anti-dilutive. Therefore, the weighted-average shares outstanding used to calculate both basic and diluted loss per common share are the same.

For the years ended December 31, 2021 and 2020, potentially dilutive securities excluded from the computations of diluted weighted-average shares outstanding were options to purchase 1,315,321 and 849,949 shares of common stock, respectively, warrants to purchase 377,652 and 353,585 shares of common stock, respectively, and 2,964 and 15,686 shares of restricted common stock, respectively.