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Net Loss per Share (Tables) | 12 Months Ended
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Dec. 31, 2020
Net Loss per Share |
Schedule of anti-dilutive common stock equivalents | ​
​ | ​ | ​ | ​ | ​
​ | ​ | As of December 31,
​ |  | 2020 | ​ | 2019
Unvested restricted stock and restricted stock unit awards |  | 507,450 | ​ | 581,408
Outstanding stock options |  | 3,912,257 | ​ | 4,358,291
Estimated number of shares issuable for convertible notes (1) | ​ | 392,240 | ​ | —
Total |  | 4,811,947 | ​ | 4,939,699
| (1) | Represents the number of shares that would have been issued if the Company had elected to pay the December Success Payment Notes, as discussed in Note 8, in shares of the Company’s common stock, based on the closing price of the common stock on December 31, 2020. The number of shares issued, for purposes of this presentation, is calculated by dividing the principal of the notes payable, including accrued interest, by the stock price per share

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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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