Basic loss per share is computed using the weighted-average number of outstanding ordinary shares during the period. Diluted loss per share is computed using the treasury stock method to the extent that the effect is dilutive by using the weighted-average number of outstanding ordinary shares and potential ordinary shares during the period. The Group’s potential ordinary shares consist of incremental shares issuable upon the assumed exercise of stock options and warrants, and the incremental shares issuable upon the assumed vesting of unvested restricted stock units, restricted stock awards, and other contingently issuable shares, excluding all anti-dilutive ordinary shares outstanding during the period. The Group used the if-converted method to calculate the dilutive impact of the warrants and adjusted the numerator for changes in profit or loss. The computation of loss per share for the respective periods is as follows:

Potential dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive were as follows: