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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2020
Income Tax Disclosure [Abstract] |
Schedule of Components of Loss Before Income Taxes | The components of loss before income taxes are as follows (in thousands):
|  | Years Ended December 31, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Domestic |  | $ | (195,617 | ) |  | $ | 2,538 |  |  | $ | (38,472 | )
Foreign |  |  | 6,686 |  |  |  | (79,180 | ) |  |  | (47,644 | )
Loss before provision for income taxes |  | $ | (188,931 | ) |  | $ | (76,642 | ) |  | $ | (86,116 | )
Schedule of Components of Provision For Income Taxes | The provision for income taxes consists of the following (in thousands):
|  | Years Ended December 31, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Current: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | — |  |  | $ | — |  |  | $ | — |
State |  |  | — |  |  |  | — |  |  |  | 2 |
Foreign |  |  | 360 |  |  |  | 328 |  |  |  | 302 |
Total current |  |  | 360 |  |  |  | 328 |  |  |  | 304 |
Deferred: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  | — |  |  |  | — |  |  |  | — |
State |  |  | — |  |  |  | — |  |  |  | — |
Foreign |  |  | — |  |  |  | — |  |  |  | — |
Total deferred |  |  | — |  |  |  | — |  |  |  | — |
Total provision for income taxes |  | $ | 360 |  |  | $ | 328 |  |  | $ | 304 |
Schedule of Reconciliation Between Statutory Federal Income Tax Rate and Effective Tax Rate | The following is the reconciliation between the statutory federal income tax rate and the Company’s effective tax rate:
| Years Ended December 31, |
| 2020 |  |  | 2019 |  |  | 2018 |
Tax at statutory federal rate |  | 21.0 | % |  |  | 21.0 | % |  |  | 21.0 | %
State tax |  | — | % |  |  | — | % |  |  | — | %
Stock-based compensation expense |  | 2.4 | % |  |  | 6.3 | % |  |  | 14.5 | %
Benefit due to intercompany transfer of assets |  | 41.7 | % |  |  | — | % |  |  | — | %
Valuation allowance on intercompany transfer of assets |  | (41.7 | )% |  |  | — | % |  |  | — | %
Net operating losses not benefitted |  | (23.2 | )% |  |  | (2.9 | )% |  |  | (23.2 | )%
Foreign net operating losses not benefitted |  | 0.7 | % |  |  | (21.7 | )% |  |  | (11.6 | )%
Deduction limitation on executive compensation |  | (0.8 | )% |  |  | (2.5 | )% |  |  | (0.5 | )%
Other |  | (0.3 | )% |  |  | (0.6 | )% |  |  | (0.6 | )%
Total |  | (0.2 | )% |  |  | (0.4 | )% |  |  | (0.4 | )%
Schedule of Significant Components of Deferred Tax Assets | Significant components of the Company’s deferred tax assets are as follows (in thousands):
|  | December 31, |
|  | 2020 |  |  | 2019 |
Federal and state net operating loss carryforwards |  | $ | 134,033 |  |  | $ | 91,267 |
Tax credit carryforwards |  |  | 62,465 |  |  |  | 52,243 |
Foreign net operating loss carryforwards |  |  | 32,417 |  |  |  | 37,786 |
Stock-based compensation |  |  | 10,399 |  |  |  | 11,159 |
Lease obligations |  |  | 8,243 |  |  |  | 10,698 |
Reserves and accruals |  |  | 5,875 |  |  |  | 5,353 |
Deferred revenue |  |  | 13,550 |  |  |  | 13,323 |
Intangible assets |  |  | 75,915 |  |  |  | — |
Other |  |  | — |  |  |  | 284 |
Subtotal |  |  | 342,897 |  |  |  | 222,113 |
Less: Valuation allowance |  |  | (337,824 | ) |  |  | (213,847 | )
Net deferred tax assets |  |  | 5,073 |  |  |  | 8,266 |
Fixed assets |  |  | (5,073 | ) |  |  | (8,266 | )
Other |  |  | — |  |  |  | — |
Net deferred tax liabilities |  |  | (5,073 | ) |  |  | (8,266 | )
Total net deferred tax assets |  | $ | — |  |  | $ | — |
Schedule of Reconciliation of the Beginning and Ending Amounts of Unrecognized Income Tax Benefits | A reconciliation of the beginning and ending amounts of unrecognized income tax benefits during the three years ended December 31, 2020 is as follows (in thousands):
|  | Federal and State |
Balance as of December 31, 2017 |  | $ | 23,361 |
Increase due to prior positions |  |  | 379 |
Increase due to current year position |  |  | 4,216 |
Balance as of December 31, 2018 |  |  | 27,956 |
Decrease due to prior positions |  |  | (111 | )
Increase due to current year position |  |  | 4,418 |
Balance as of December 31, 2019 |  |  | 32,263 |
Decrease due to prior positions |  |  | (137 | )
Increase due to current year position |  |  | 16,448 |
Balance as of December 31, 2020 |  | $ | 48,574 |

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