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NET INCOME (LOSS) PER COMMON SHARE (Tables) | 12 Months Ended
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Dec. 31, 2021
Earnings Per Share [Abstract] |
Computation of Basic and Diluted Earnings per Common Share | The following table sets forth the computation of basic and diluted income (loss) per common share (common shares in thousands):
| Years Ended December 31,
| 2021 |  | 2020 |  | 2019
Numerator: |  |  |  |  |
Net income (loss), basic | $ | (64,080) |  |  | $ | 859,100 |  |  | $ | (23,848) |
Add: Interest on convertible notes | — |  |  | 8,313 |  |  | — |
Net income (loss), diluted | $ | (64,080) |  |  | $ | 867,413 |  |  | $ | (23,848) |
Denominator: |  |  |  |  |
Weighted-average common shares outstanding, basic | 182,852 |  |  | 180,804 |  |  | 179,039 |
Effect of dilutive securities: |  |  |  |  |
Options to purchase common stock | — |  |  | 1,543 |  |  | — |
Common stock issuable under the 2027 notes | — |  |  | 2,874 |  |  | — |
Common stock issuable under the 2024 notes | — |  |  | 3,970 |  |  | — |
Unvested RSUs | — |  |  | 1,938 |  |  | — |
Common stock potentially issuable for ESPP purchases | — |  |  | 353 |  |  | — |
The Company's common stock held by the NQDC | — |  |  | 196 |  |  | — |
Weighted-average common shares outstanding, diluted | 182,852 |  |  | 191,678 |  |  | 179,039 |
Net income (loss) per common share, basic | $ | (0.35) |  |  | $ | 4.75 |  |  | $ | (0.13) |
Net income (loss) per common share, diluted | $ | (0.35) |  |  | $ | 4.53 |  |  | $ | (0.13) |
Schedule Of Shares Excluded From Computation of Basic and Diluted Net Loss Per Share | In addition to the equity instruments included in the table above, the table below presents potential shares of common stock that were excluded from the computation of basic and diluted income (loss) per common share as they were anti-dilutive (in thousands):
| Years Ended December 31,
| 2021 |  | 2020 |  | 2019
Options to purchase common stock | 6,450 |  |  | 5,287 |  |  | 7,264 |
Common stock issuable under the 2027 Notes | 4,365 |  |  | — |  |  | — |
Common stock issuable under the 2024 Notes | 3,970 |  |  | — |  |  | 3,970 |
Common stock issuable under the 2020 Notes | — |  |  | — |  |  | 3,983 |
Unvested RSUs | 5,225 |  |  | 2,235 |  |  | 3,956 |
Common stock potentially issuable for ESPP purchases | 594 |  |  | 314 |  |  | 587 |
The Company's common stock held by the NQDC | 181 |  |  | — |  |  | 205 |
Total number of potentially issuable shares | 20,785 |  |  | 7,836 |  |  | 19,965 |

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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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