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Summary of Significant Accounting Policies - Antidilutive Securities (Details) - shares shares in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Anti-dilutive securities |  |  |
Anti-dilutive securities excluded from computation of earnings per share | 8,827 | 4,940 | 4,007
Stock options |  |  |
Anti-dilutive securities |  |  |
Anti-dilutive securities excluded from computation of earnings per share | 2,951 | 4,399 | 3,616
Restricted Stock Units (RSUs) [Member] |  |  |
Anti-dilutive securities |  |  |
Anti-dilutive securities excluded from computation of earnings per share | 740 | 526 | 365
ESPP |  |  |
Anti-dilutive securities |  |  |
Anti-dilutive securities excluded from computation of earnings per share | 11 | 15 | 26
Convertible senior note |  |  |
Anti-dilutive securities |  |  |
Anti-dilutive securities excluded from computation of earnings per share | 5,125 |  |

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: 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 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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