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Income Taxes - Narrative (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Provision for (benefit from) income taxes | $ 38,428,000 | $ (31,459,000) | $ 420,000
Income tax examination, penalties and interest accrued | 0 | $ 0 |
Federal |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Net operating loss carryforwards | 0 |  |
Federal | Research tax credit carryforward |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Credit carryforwards | 4,100,000 |  |
State | Research tax credit carryforward |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Net operating loss carryforwards | 46,500,000 |  |
Credit carryforwards | 11,500,000 |  |
Discontinued operations, disposed of by sale | MyCase |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Tax expense relating to the MyCase transaction | 51,300,000 |  |
Tax expense on gain of sale | 52,300,000 |  |
Benefit on reversal of tax liabilities | $ 1,000,000.0 |  |

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