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Net Loss Per Share of Common Stock (Tables) | 9 Months Ended
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Sep. 30, 2018
Earnings Per Share [Abstract] |
Schedule of Basic and Diluted Net Loss per Share | The following table summarizes the computation of basic and diluted net loss per share (in thousands, except share and per share data):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Net loss | $ | (4,792 | ) |  | $ | (5,683 | ) |  | $ | (12,140 | ) |  | $ | (18,134 | )
Weighted-average shares used to compute basic and diluted net loss per share* | 3,712,876 |  |  | 3,475,628 |  |  | 3,638,905 |  |  | 3,450,252 |
Net loss per share, basic and diluted* | $ | (1.29 | ) |  | $ | (1.64 | ) |  | $ | (3.34 | ) |  | $ | (5.26 | )
_________________________________________ * Calculated based on the 1-for-18 reverse stock split effected October 4, 2018.
Schedule of Antidilutive Securities Excluded from Computation of Diluted Net Loss per Share | The following common stock equivalents were excluded from the computation of diluted net loss per share for the periods presented because including them would have been antidilutive:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Stock options | 2,711,667 |  | 3,015,021 |  | 2,711,667 |  | 3,015,021
Shares subject to repurchase | 78,757 |  | 25,150 |  | 78,757 |  | 25,150
Redeemable convertible preferred stock | 12,066,654 |  | 12,066,654 |  | 12,066,654 |  | 12,066,654
Redeemable convertible preferred stock warrants | 160,657 |  | 160,657 |  | 160,657 |  | 160,657
Common stock warrants | 124,326 |  | 124,326 |  | 124,326 |  | 124,326

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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