14. Net Loss per Share

Basic and diluted net loss per share attributable to common stockholders was calculated as follows (in thousands, except share and per share amounts):

 

Upon the issuance of Series A Preferred Stock, the holders of such shares were entitled to cumulative dividends of 8.0% per year, compounding annually. In connection with the issuance and sale of Series B Preferred Stock in June 2017, the holders of Series A Preferred Stock agreed to remove the cumulative dividend and redemption rights associated with the Series A Preferred Stock. Accordingly, during the year ended December 31, 2017, the calculation of net loss attributable to common stockholders included the accretion of Series A redeemable convertible preferred stock to redemption value.

The Company’s potential dilutive securities have been excluded from the computation of diluted net loss per share as the effect would be to reduce the net loss per share. Therefore, the weighted average number of common shares outstanding used to calculate both basic and diluted net loss per share attributable to common stockholders is the same. The Company excluded the following potential common shares from the periods in the table above, presented based on amounts outstanding at each period end, from the computation of diluted net loss per share attributable to common stockholders for the periods indicated because including them would have had an anti-dilutive effect: