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Net Loss per Share | 12 Months Ended
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Dec. 31, 2020
Net Loss per Share |
Net Loss per Share | 14. Net Loss per Share The Company calculates basic net loss per share by dividing net loss by the weighted average number of common shares outstanding, excluding restricted common stock. The Company has generated a net loss in all periods presented, so the basic and diluted net loss per share are the same, as the inclusion of the potentially dilutive securities would be anti-dilutive. Basic and diluted net loss per share is calculated as follows (in thousands, except share and per share data):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Year Ended |  | Year Ended
​ |  | December 31, 2020 |  | December 31, 2019
Net loss | ​ | $ | (86,483) | ​ | $ | (51,000)
Weighted average common shares outstanding, basic and diluted | ​ |  | 30,734,109 | ​ |  | 27,537,939
Net loss per share, basic and diluted | ​ | $ | (2.81) | ​ | $ | (1.85)
​ The weighted average number of common shares used in the basic and diluted net loss per share calculation include the pre-funded warrants issued in connection with the Company’s November 2, 2020 follow-on offering as the warrants are exercisable at any time for nominal cash consideration. ​ The following table sets forth the outstanding common stock equivalents, presented based on amounts outstanding at each period end, that have been excluded from the calculation of diluted net loss per share for the periods indicated because their inclusion would have been anti-dilutive: ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31, | ​
​ |  | 2020 |  | 2019 |
Restricted common stock | ​ | 57,969 | ​ | 302,360 | ​
Warrant | ​ | — | ​ | 7,614 | ​
Stock options | ​ | 3,679,931 | ​ | 2,401,382 | ​
​ | ​ | 3,737,900 | ​ | 2,711,356 | ​
​

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