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Net Loss Per Share Attributable to Common Stockholders (Tables) | 12 Months Ended
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Dec. 31, 2018
Earnings Per Share [Abstract] |
Schedule of Basic and Diluted Net Loss Per Share Attributable to Common Stockholders | The following table sets forth the computation of the Company’s basic and diluted net loss per share attributable to common stockholders for the years ended December 31, 2018, 2017 and 2016 (in thousands, except share and per share data):
| 2018 |  | 2017 |  | 2016
Numerator: |  |  |  |  |
Net loss | $ | (19,907 | ) |  | $ | (4,123 | ) |  | $ | (16,233 | )
Less: Premium on repurchase of redeemable convertible preferred stock | — |  |  | (6,506 | ) |  | — |
Net loss attributable to common stockholders | $ | (19,907 | ) |  | $ | (10,629 | ) |  | $ | (16,233 | )
Denominator: |  |  |  |  |
Weighted-average shares used to compute net loss per share attributable to common stockholders, basic and diluted | 52,327,518 |  |  | 32,944,714 |  |  | 32,071,604 |
Net loss per share attributable to common stockholders, basic and diluted | $ | (0.38 | ) |  | $ | (0.32 | ) |  | $ | (0.51 | )
Schedule of Potentially Dilutive Shares Excluded from Computation of Diluted Net Loss Per Share Attributable to Common Stockholders | For the years ended December 31, 2018, 2017 and 2016, the following potentially dilutive shares were excluded from the computation of diluted net loss per share attributable to common stockholders because including them would have been anti-dilutive:
| 2018 |  | 2017 |  | 2016
Options to purchase common stock | 23,774,279 |  |  | 23,607,746 |  |  | 20,929,502 |
Common stock issuable upon conversion of redeemable convertible preferred stock | — |  |  | 61,279,079 |  |  | 65,464,387 |
Common stock issuable upon exercise of common stock warrants | 898,331 |  |  | 45,286 |  |  | 45,286 |
Common stock issuable upon exercise and redeemable conversion of preferred stock warrants | — |  |  | 398,331 |  |  | 481,512 |
Common stock issuable upon vesting of restricted stock units | 288,460 |  |  | — |  |  | — |
Total | 24,961,070 |  |  | 85,330,442 |  |  | 86,920,687 |

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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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