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Income Taxes - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2021 USD ($)
Income Taxes [Line Items]
Net deferred tax asset	$ 0
Income tax expense	0
Valuation allowance, net operating loss	$ 5,900,000
Estimated Annual Effective Tax Rate	5.265%
Effective tax rate	0.00%
Federal [Member]
Income Taxes [Line Items]
Net operating loss carryforwards subject to expiration	$ 204,000,000.0
Net operating loss carryforwards expiration year	2025
Net operating loss carryforwards expiration year	2038
Net operating loss carryforwards	$ 5,900,000
Foreign [Member]
Income Taxes [Line Items]
Net operating loss carryforwards subject to expiration	$ 64,800,000

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Income taxes.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards that are subject to expiration dates.

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