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Income Taxes - Additional Information (Detail) - USD ($) | Dec. 31, 2020 | Nov. 19, 2020 | Dec. 31, 2019
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Income Tax Contingency [Line Items] |  |  |
Valuation allowance | $ 565,400,000 |  | $ 2,900,000
Unrecognized tax benefits | 0 |  | $ 0
Federal |  |  |
Income Tax Contingency [Line Items] |  |  |
Net operating loss | 141,800,000 | $ 1,400,000,000 |
State |  |  |
Income Tax Contingency [Line Items] |  |  |
Net operating loss | $ 148,100,000 |  |

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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 + Details
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