15. Net Loss Per Share The following table sets forth the computation of basic and diluted net loss per share: | | | Three months ended
March 31, | | | | | 2018 | | 2017 | | | Numerator: | | | | | | | | | Net loss | | | | | | | | | Basic | | $ | (7,901) | | $ | (8,302) | | | Adjustment for revaluation of warrant liability | | | - | | | - | | | Diluted | | $ | (7,901) | | $ | (8,302) | | | | | | | | | | | | Denominator: | | | | | | | | | Weighted-average number of shares, basic | | | 60,146 | | | 21,899 | | | Effect of dilutive warrants | | | - | | | - | | | Weighted-average numbers of shares, diluted | | | 60,146 | | | 21,899 | | | | | | | | | | | | Net loss per share, basic | | $ | (0.13) | | $ | (0.38) | | | Net loss per share, diluted | | $ | (0.13) | | $ | (0.38) | | The following table sets forth potential shares of common stock that are not included in the calculation of diluted net loss per share because to do so would be anti-dilutive as of the end of each period presented: | | | Three months ended
March 31, | | | | | 2018 | | 2017 | | | Options to purchase common stock | | | 2,898 | | | 2,466 | | | Restricted stock | | | 125 | | | - | | | Warrants for common stock | | | 3,396 | | | 3,226 | | | Total common stock equivalents | | | 6,419 | | | 5,692 | |
|