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Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Line Items]
Deferred tax assets, net operating loss carryforwards	$ 1,240,000	$ 1,446,000
Benefit of net operating loss carryforwards	5,400,000
Unrecognized tax benefit that would affect the effective tax rate	2,800,000
Uncertain tax positions, interest expense and penalties accrued	400,000
Minimum [Member]
Income Taxes [Line Items]
Decrease in unrecognized tax benefits, net of penalties and interest	0
Maximum [Member]
Income Taxes [Line Items]
Decrease in unrecognized tax benefits, net of penalties and interest	$ 2,000,000.0

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Income tax expense benefit operating loss carryforwards.

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Income Taxes [Line Items]

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 6
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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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