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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