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Income Taxes - Narrative (Detail) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Income Taxes [Line Items]
Unrecognized tax benefits	$ 0	$ 0
Federal
Income Taxes [Line Items]
Net operating loss carryovers	4,400,000
State and Local Jurisdiction
Income Taxes [Line Items]
Net operating loss carryovers	$ 4,400,000

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Income Taxes [Line Items]

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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Amount of unrecognized tax benefits.

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