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Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2019
Accounting Policies [Abstract] |
Summary of Common Stock Equivalents Outstanding | The Company excluded the following common stock equivalents, outstanding as of September 30, 2019 and 2018, from the computation of diluted net loss per share for the three and nine months ended September 30, 2019 and 2018 because they had an anti-dilutive impact due to the net loss incurred for the periods:
|  | As of September 30, |
|  | 2019 |  |  | 2018 |
Options to purchase common stock |  |  | 5,118,280 |  |  |  | 5,676,861 |
Unvested restricted common stock |  |  | 56,770 |  |  |  | 4,465 |
|  |  | 5,175,050 |  |  |  | 5,681,326 |

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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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