Net Loss Per Share The following table sets forth the computation of basic and diluted net loss per share: | | | | | | | | | | | | | | | | | | Three Months Ended September 30, | | Nine Months Ended September 30, | | 2018 | | 2017 | | 2018 | | 2017 | Numerator: | |
| | |
| | |
| | |
| Net loss applicable to common stockholders, basic and diluted | $ | (6,983 | ) | | $ | (6,335 | ) | | $ | (22,860 | ) | | $ | (20,144 | ) | Denominator: | | | | | | | | Weighted-average number of shares, basic and diluted | 61,381 |
| | 34,720 |
| | 60,721 |
| | 27,425 |
| | | | | | | | | Net loss per share, basic and diluted | $ | (0.11 | ) | | $ | (0.18 | ) | | $ | (0.38 | ) | | $ | (0.73 | ) |
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 September 30, | | Nine Months Ended September 30, | | 2018 | | 2017 | | 2018 | | 2017 | Options to purchase common stock | 5,888 |
| | 2,972 |
| | 5,888 |
| | 2,972 |
| Restricted stock | 293 |
| | 609 |
| | 293 |
| | 609 |
| Warrants for common stock | 3,396 |
| | 3,426 |
| | 3,396 |
| | 3,426 |
| Total common stock equivalents | 9,577 |
| | 7,007 |
| | 9,577 |
| | 7,007 |
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