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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands | Common Stock [Member] | Additional Paid In Capital [Member] | Accumulated Other Comprehensive Loss [Member] | Accumulated Deficit [Member] | Total
--- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2020 | $ 140 | $ 1,895,519 | $ (21,071) | $ (1,131,306) | $ 743,282
Balance (in shares) at Dec. 31, 2020 | 140,366 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net loss | $ 0 | 0 | 0 | (253,210) | (253,210)
Change in unrealized losses, net of tax | 0 | 0 | (6,321) | 0 | (6,321)
Foreign currency translation | 0 | 0 | (45) | 0 | (45)
Issuance of common stock in connection with employee stock plans | $ 1 | 11,563 | 0 | 0 | 11,564
Issuance of common stock in connection with employee stock plans (in shares) | 1,094 |  |  |  |
Issuance of warrants | $ 0 | 89,752 | 0 | 0 | 89,752
Purchase of note hedges | 0 | (136,620) | 0 | 0 | (136,620)
Stock-based compensation expense | 0 | 98,419 | 0 | 0 | 98,419
Payments of tax withholdings related to vesting of employee stock awards and exercise of employee stock options | $ 0 | (16,285) | 0 | 0 | (16,285)
Payments of tax withholdings related to vesting of employee stock awards and exercise of employee stock options (in shares) | (276) |  |  |  |
Balance at Sep. 30, 2021 | $ 141 | 1,942,348 | (27,437) | (1,384,516) | 530,536
Balance (in shares) at Sep. 30, 2021 | 141,184 |  |  |  |
Balance at Jun. 30, 2021 | $ 141 | 1,910,379 | (25,796) | (1,302,050) | 582,674
Balance (in shares) at Jun. 30, 2021 | 141,022 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net loss | $ 0 | 0 | 0 | (82,466) | (82,466)
Change in unrealized losses, net of tax | 0 | 0 | (1,618) | 0 | (1,618)
Foreign currency translation | 0 | 0 | (23) | 0 | (23)
Issuance of common stock in connection with employee stock plans | $ 0 | 1,922 | 0 | 0 | 1,922
Issuance of common stock in connection with employee stock plans (in shares) | 176 |  |  |  |
Issuance of warrants | $ 0 | 0 | 0 | 0 | 0
Purchase of note hedges | 0 | 0 | 0 | 0 | 0
Stock-based compensation expense | 0 | 30,537 | 0 | 0 | 30,537
Payments of tax withholdings related to vesting of employee stock awards and exercise of employee stock options | $ 0 | (490) | 0 | 0 | (490)
Payments of tax withholdings related to vesting of employee stock awards and exercise of employee stock options (in shares) | (14) |  |  |  |
Balance at Sep. 30, 2021 | $ 141 | 1,942,348 | (27,437) | (1,384,516) | 530,536
Balance (in shares) at Sep. 30, 2021 | 141,184 |  |  |  |
Balance at Dec. 31, 2021 | $ 141 | 1,964,167 | (32,668) | (1,159,903) | 771,737
Balance (in shares) at Dec. 31, 2021 | 141,210 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net loss | $ 0 | 0 | 0 | (217,292) | (217,292)
Change in unrealized losses, net of tax | 0 | 0 | (29,508) | 0 | (29,508)
Foreign currency translation | 0 | 0 | (964) | 0 | (964)
Issuance of common stock in connection with employee stock plans | $ 1 | 6,029 | 0 | 0 | 6,030
Issuance of common stock in connection with employee stock plans (in shares) | 1,138 |  |  |  |
Stock-based compensation expense | $ 0 | 74,575 | 0 | 0 | 74,575
Payments of tax withholdings related to vesting of employee stock awards and exercise of employee stock options | $ 0 | (10,217) | 0 | 0 | (10,217)
Payments of tax withholdings related to vesting of employee stock awards and exercise of employee stock options (in shares) | (331) |  |  |  |
Balance at Sep. 30, 2022 | $ 142 | 2,034,554 | (63,140) | (1,377,195) | 594,361
Balance (in shares) at Sep. 30, 2022 | 142,017 |  |  |  |
Balance at Jun. 30, 2022 | $ 142 | 2,008,794 | (54,007) | (1,330,203) | 624,726
Balance (in shares) at Jun. 30, 2022 | 141,831 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net loss | $ 0 | 0 | 0 | (46,992) | (46,992)
Change in unrealized losses, net of tax | 0 | 0 | (8,734) | 0 | (8,734)
Foreign currency translation | 0 | 0 | (399) | 0 | (399)
Issuance of common stock in connection with employee stock plans | $ 0 | 2,567 | 0 | 0 | 2,567
Issuance of common stock in connection with employee stock plans (in shares) | 203 |  |  |  |
Stock-based compensation expense | $ 0 | 23,837 | 0 | 0 | 23,837
Payments of tax withholdings related to vesting of employee stock awards and exercise of employee stock options | $ 0 | (644) | 0 | 0 | (644)
Payments of tax withholdings related to vesting of employee stock awards and exercise of employee stock options (in shares) | (17) |  |  |  |
Balance at Sep. 30, 2022 | $ 142 | $ 2,034,554 | $ (63,140) | $ (1,377,195) | $ 594,361
Balance (in shares) at Sep. 30, 2022 | 142,017 |  |  |  |

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- Definition Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. 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