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Income Taxes - Additional Information (Detail) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 USD ($) | Jun. 30, 2020 USD ($)
Income Taxes [Line Items] |  |
Net deferred tax asset | $ 0 | $ 0
Income tax expense | 0 | 0
Valuation allowance, net operating loss | 1,600,000 | $ 1,600,000
Estimated Annual Effective Tax Rate |  | 23.31%
Effective tax rate |  | 0.00%
Federal [Member] |  |
Income Taxes [Line Items] |  |
Net operating loss carryforwards subject to expiration | 187,300,000 | $ 187,300,000
Net operating loss carryforwards expiration year |  | 2025
Net operating loss carryforwards expiration year |  | 2038
Net operating loss carryforwards | 7,400,000 | $ 7,400,000
Foreign [Member] |  |
Income Taxes [Line Items] |  |
Net operating loss carryforwards subject to expiration | 55,200,000 | 55,200,000
Net operating loss carryforwards | $ 6,300,000 | $ 6,300,000

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