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Basic and Diluted Net Loss per Common Share (Tables) | 12 Months Ended
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Dec. 31, 2021
Earnings Per Share [Abstract] |
Schedule of Reconciliation of the Numerator and Denominator Used in Computing Basic and Diluted Net Loss Per Common Share | The following table provides a reconciliation of the numerator and denominator used in computing basic and diluted net loss attributable to common stockholders per common share:
|  | Years Ended December 31,
(in thousands, except per share amounts) |  | 2021 |  | 2020 |  | 2019
Numerator: |  |  |  |  |  |
Net loss attributable to common stockholders |  | $ | (250,460) |  |  | $ | (276,852) |  |  | $ | (356,388) |
Denominator: |  |  |  |  |  |
Weighted average common shares outstanding — basic and diluted |  | 271,421,986 |  |  | 258,867,380 |  |  | 240,421,001 |
Schedule of Potential Shares of Common Stock that were Excluded from the Computation as they were Anti-Dilutive Using the Treasury Stock Method | The table below presents potential shares of common stock that were excluded from the computation as they were anti-dilutive using the treasury stock method:
|  | Years ended December 31,
(in thousands) |  | 2021 |  | 2020 |  | 2019
Options to purchase common stock |  | 14,731 |  |  | 14,032 |  |  | 16,724 |
Unvested restricted stock units |  | 7,341 |  |  | 7,080 |  |  | 5,792 |
Outstanding warrants, convertible to common stock |  | — |  |  | 2,555 |  |  | 2,555 |
Convertible notes |  | — |  |  | 462 |  |  | 462 |
Total number of potentially issuable shares |  | 22,072 |  |  | 24,129 |  |  | 25,533 |

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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=124432515&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=124432515&loc=d3e3550-109257 + Details
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