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Net Income (Loss) Per Common Share - Schedule Of Anti-Dilutive Common Stock Excluded From Computation of Diluted Net Loss Per Share (Detail) - shares shares in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Total number of potentially issuable shares (in shares) | 18,504 | 25,091 | 18,310 | 21,060
Options to purchase common stock |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Total number of potentially issuable shares (in shares) | 6,478 | 7,157 | 6,348 | 5,386
Convertible Notes due 2020 |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Total number of potentially issuable shares (in shares) | 0 | 3,983 | 0 | 3,983
Common stock issuable under the 2024 notes |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Total number of potentially issuable shares (in shares) | 3,970 | 3,970 | 3,970 | 3,970
Common stock issuable under the 2027 Notes |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Total number of potentially issuable shares (in shares) | 4,365 | 4,365 | 4,365 | 4,365
Unvested RSUs |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Total number of potentially issuable shares (in shares) | 3,349 | 4,832 | 3,290 | 3,099
Common stock potentially issuable for ESPP purchases |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Total number of potentially issuable shares (in shares) | 342 | 574 | 337 | 257

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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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