13. Net Loss Per Share

The following table presents the calculation of basic and diluted net loss per share applicable to common stockholders. Basic net loss per share is calculated by dividing net loss attributable to common shareholders by the weighted-average number of shares outstanding during the period which includes 42,538,910 pre-funded warrants and shares held in abeyance from date of issuance.

The Company’s potentially dilutive securities have been excluded from the computation of diluted net loss per share applicable to common stockholders, prior to the application of the treasury stock method, because their effect would have been antidilutive for the periods presented. Therefore, the weighted average number of shares outstanding used to calculate both basic and diluted net loss per share attributable to common stockholders is the same. The potentially dilutive securities that have been excluded from the computation of diluted net loss per share include stock options and warrants to purchase common stock, restricted common stock and shares of common stock issued as contingent consideration in connection with the acquisition of CorHepta, for which the vesting conditions have not been met. The Company excluded the following potential shares, presented based on amounts outstanding at each period end, from the computation of diluted net loss per share for the periods indicated: