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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 | (170,744) | (170,744)
Change in unrealized losses, net of tax | 0 | 0 | (4,703) | 0 | (4,703)
Foreign currency translation | 0 | 0 | (22) | 0 | (22)
Issuance of common stock in connection with employee stock plans | $ 1 | 9,641 | 0 | 0 | 9,642
Issuance of common stock in connection with employee stock plans (in shares) | 917 |  |  |  |
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 | 67,882 | 0 | 0 | 67,882
Payments of tax withholdings related to vesting of employee stock awards and exercise of employee stock options | $ 0 | (15,795) | 0 | 0 | (15,795)
Payments of tax withholdings related to vesting of employee stock awards and exercise of employee stock options (in shares) | (261) |  |  |  |
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 |  |  |  |
Balance at Mar. 31, 2021 | $ 141 | 1,925,801 | (24,203) | (1,221,175) | 680,564
Balance (in shares) at Mar. 31, 2021 | 140,924 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net loss | $ 0 | 0 | 0 | (80,875) | (80,875)
Change in unrealized losses, net of tax | 0 | 0 | (1,697) | 0 | (1,697)
Foreign currency translation | 0 | 0 | 104 | 0 | 104
Issuance of common stock in connection with employee stock plans | $ 0 | 1,882 | 0 | 0 | 1,882
Issuance of common stock in connection with employee stock plans (in shares) | 108 |  |  |  |
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 | 30,022 | 0 | 0 | 30,022
Payments of tax withholdings related to vesting of employee stock awards and exercise of employee stock options | $ 0 | (458) | 0 | 0 | (458)
Payments of tax withholdings related to vesting of employee stock awards and exercise of employee stock options (in shares) | (10) |  |  |  |
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 |  |  |  |
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 | (170,300) | (170,300)
Change in unrealized losses, net of tax | 0 | 0 | (20,774) | 0 | (20,774)
Foreign currency translation | 0 | 0 | (565) | 0 | (565)
Issuance of common stock in connection with employee stock plans | $ 1 | 3,461 | 0 | 0 | 3,462
Issuance of common stock in connection with employee stock plans (in shares) | 935 |  |  |  |
Stock-based compensation expense | $ 0 | 50,738 | 0 | 0 | 50,738
Payments of tax withholdings related to vesting of employee stock awards and exercise of employee stock options | $ 0 | (9,572) | 0 | 0 | (9,572)
Payments of tax withholdings related to vesting of employee stock awards and exercise of employee stock options (in shares) | (314) |  |  |  |
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 |  |  |  |
Balance at Mar. 31, 2022 | $ 142 | 1,983,078 | (48,578) | (1,225,068) | 709,574
Balance (in shares) at Mar. 31, 2022 | 141,753 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net loss | $ 0 | 0 | 0 | (105,135) | (105,135)
Change in unrealized losses, net of tax | 0 | 0 | (5,018) | 0 | (5,018)
Foreign currency translation | 0 | 0 | (411) | 0 | (411)
Issuance of common stock in connection with employee stock plans | $ 0 | 1,614 | 0 | 0 | 1,614
Issuance of common stock in connection with employee stock plans (in shares) | 87 |  |  |  |
Stock-based compensation expense | $ 0 | 24,502 | 0 | 0 | 24,502
Payments of tax withholdings related to vesting of employee stock awards and exercise of employee stock options | $ 0 | (400) | 0 | 0 | (400)
Payments of tax withholdings related to vesting of employee stock awards and exercise of employee stock options (in shares) | (9) |  |  |  |
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 |  |  |  |

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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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(a)(3)(iii)(03) + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant