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Net Loss Per Share (Tables) | 12 Months Ended
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Dec. 31, 2020
Earnings Per Share [Abstract] |
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share | The following table sets forth the potential weighted common shares outstanding that were excluded from the diluted net loss per share computations:
| December 31,
(in thousands) | 2020 |  | 2019 |  | 2018
2020 Notes | 312 |  |  | 1,322 |  |  | — |
2022 Notes | 192 |  |  | n/a |  | n/a
Stock options | 1,603 |  |  | 2,568 |  |  | 3,327 |
Restricted stock units | 3,041 |  |  | 2,955 |  |  | 2,997 |
Stock purchase rights under the ESPP | 531 |  |  | 478 |  |  | 609 |
Warrants (1) | — |  |  | 4,321 |  |  | 1,268 |
Total | 5,679 |  |  | 11,644 |  |  | 8,201 |

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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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