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NET INCOME (LOSS) PER COMMON SHARE - Anti-Dilutive Common Stock Excluded From Computation of Basic and Diluted Net Loss Per Share (Detail) - shares shares in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Potential shares of common stock excluded from computation of earnings (loss) per share as they are anti-dilutive (in shares) | 20,785 | 7,836 | 19,965
Stock Option |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Potential shares of common stock excluded from computation of earnings (loss) per share as they are anti-dilutive (in shares) | 6,450 | 5,287 | 7,264
Common stock issuable under the 2027 Notes |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Potential shares of common stock excluded from computation of earnings (loss) per share as they are anti-dilutive (in shares) | 4,365 | 0 | 0
Common stock issuable under the 2024 Notes |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Potential shares of common stock excluded from computation of earnings (loss) per share as they are anti-dilutive (in shares) | 3,970 | 0 | 3,970
Common stock issuable under the 2020 Notes |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Potential shares of common stock excluded from computation of earnings (loss) per share as they are anti-dilutive (in shares) | 0 | 0 | 3,983
Unvested RSUs |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Potential shares of common stock excluded from computation of earnings (loss) per share as they are anti-dilutive (in shares) | 5,225 | 2,235 | 3,956
Common stock potentially issuable for ESPP purchases |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Potential shares of common stock excluded from computation of earnings (loss) per share as they are anti-dilutive (in shares) | 594 | 314 | 587
The Company's common stock held by the NQDC |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Potential shares of common stock excluded from computation of earnings (loss) per share as they are anti-dilutive (in shares) | 181 | 0 | 205

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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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