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Net loss per share - (Tables) | 3 Months Ended
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Mar. 31, 2021
Earnings Per Share [Abstract] |
Schedule of computation of basic and diluted net loss available to common stockholders | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31, | ​
​ |  | 2021 |  | 2020 |
Numerator | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net loss | ​ | $ | (128,642) |  | $ | (112,687) |
Denominator | ​ | ​ | ​ | ​ | ​ | ​ | ​
Denominator for basic and diluted net loss per share | ​ |  | 70,188,602 |  |  | 62,389,158 |
Net loss per share: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic and diluted | ​ | $ | (1.83) | * | $ | (1.81) | *
* In the three months ended March 31, 2021 and 2020, the Company experienced a net loss and therefore did not report any dilutive share impact.
Schedule of historical dilutive common share equivalents outstanding | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of March 31, | ​
​ |  | 2021 |  | 2020 |
Stock Options | ​ | 10,989,202 | ​ | 12,670,068 | ​
Unvested restricted stock awards and units |  | 1,494,638 |  | 927,151 |
Total |  | 12,483,840 |  | 13,597,219 |

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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://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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