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Net Loss Per Share (Tables) | 9 Months Ended
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Sep. 30, 2020
Net Loss Per Share |
Computation of Basic and Diluted Loss Per Share Attributable to Common Stockholders | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Nine Months Ended September 30, | ​
​ |  | 2020 |  | 2019 |  | 2020 |  | 2019 |
Numerator: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Net loss | ​ | $ | (18,108) | ​ | $ | (23,539) | ​ | $ | (65,437) | ​ | $ | (75,150) | ​
Denominator: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​
Weighted average common shares outstanding - basic and diluted | ​ |  | 89,365,798 | ​ |  | 62,828,513 | ​ |  | 89,109,772 | ​ |  | 62,676,591 | ​
Net loss per share - basic and diluted | ​ | $ | (0.20) | ​ | $ | (0.37) | ​ | $ | (0.73) | ​ | $ | (1.20) | ​

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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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