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Net Loss Per Share | 12 Months Ended
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Dec. 31, 2021
Earnings Per Share [Abstract] |
Net Loss Per Share | Net Loss Per Share The table below provides a reconciliation of the numerators and denominators of basic and diluted net loss per share for the years ended December 31, 2021, 2020 and 2019 (in thousands, except per share amounts):
|  |  | Year Ended December 31,
|  |  |  |  | 2021 |  | 2020 |  | 2019
Numerators: |  |  |  |  |  |  |  |  |
Net loss |  |  |  |  | $ | (63,993) |  |  | $ | (468,383) |  |  | $ | (231,808) |
Less: Income attributable to unvested restricted stock awards |  |  |  |  | — |  |  | — |  |  | — |
Numerator for basic net loss per share |  |  |  |  | (63,993) |  |  | (468,383) |  |  | (231,808) |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |
Unvested restricted stock awards |  |  |  |  | — |  |  | — |  |  | — |
Numerator for diluted net loss per share |  |  |  |  | $ | (63,993) |  |  | $ | (468,383) |  |  | $ | (231,808) |
Denominators: |  |  |  |  |  |  |  |  |
Weighted average number of common shares outstanding |  |  |  |  | 61,314 |  |  | 60,953 |  |  | 60,424 |
Less: Weighted average number of unvested restricted stock awards outstanding |  |  |  |  | (1,021) |  |  | (1,141) |  |  | (1,045) |
Denominator for basic and diluted net loss per share |  |  |  |  | 60,293 |  |  | 59,812 |  |  | 59,379 |
Net loss per share: |  |  |  |  |  |  |  |  |
Basic |  |  |  |  | $ | (1.06) |  |  | $ | (7.83) |  |  | $ | (3.90) |
Diluted |  |  |  |  | (1.06) |  |  | (7.83) |  |  | (3.90) |
The calculation of diluted net loss per share for the years ended December 31, 2021, 2020 and 2019 excluded 430 thousand shares, 582 thousand shares and 659 thousand shares, respectively, issuable pursuant to outstanding stock options, due to their antidilutive effect. Additionally, shares issuable upon conversion of both the 2023 Notes and the 2026 Notes were excluded due to, among other factors, their antidilutive effect.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -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 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3630-109257 + Details
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