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Net Loss Per Common Share

9 Months Ended

Sep. 30, 2018

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 shares are the same.

For the three and nine months ended September 30, 2018 and 2017, potentially dilutive securities excluded from the computations of diluted weighted-average shares outstanding were options to purchase 493,324 and 478,453 shares of common stock, respectively, warrants to purchase 353,980 and 373,539 shares of common stock, respectively, and 2,571 and 0 shares of restricted common stock, respectively.