Income Taxes - Reconciliation of Effective Tax Rate and the Federal Statutory Tax Rate (Detail)	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Federal statutory rate (as a percent)	21.00%	21.00%	21.00%
State income taxes, net of federal income tax benefit (as a percent)	14.29%	(19.47%)	11.01%
Non-deductible expenses (as a percent)	(1.42%)	7.49%	3.80%
Compensation expense (as a percent)	65.78%	(135.12%)	(12.52%)
Transaction expenses (as a percent)	0.00%	0.00%	7.09%
Tax credits (as a percent)	32.11%	0.00%	(1.87%)
Adjustment due to adoption of accounting standards (as a percent)	0.00%	0.00%	(13.84%)
Uncertain tax position (as a percent)	1.21%	(3.32%)	0.00%
Return to provision (as a percent)	7.38%	(13.20%)	0.00%
Foreign Tax Rate Differential (as a percent)	(1.64%)	0.00%	7.20%
Other, net (as a percent)	(0.06%)	(2.78%)	0.66%
Valuation allowance (as a percent)	(8.97%)	25.74%	8.44%
Effective tax rate (as a percent)	129.68%	(119.66%)	30.97%

Effective Income Tax Rate Reconciliation, Change In Accounting Standard, Percent

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Effective Income Tax Rate Reconciliation, Other Tax Credits, Percent

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Effective Income Tax Rate Reconciliation, Return To Provision, Percent

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Effective Income Tax Rate Reconciliation, Transaction Expenses

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Effective Income Tax Rate Reconciliation, Uncertain Tax Positions, Percent

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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-Publisher FASB
-Name Accounting Standards Codification
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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

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Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for share-based payment arrangement.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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