Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

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Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Operating Loss Carryforwards [Line Items]      
Unrecognized tax benefits $ 3,867 $ 4,297 $ 0
Domestic Tax Authority      
Operating Loss Carryforwards [Line Items]      
Operating loss carryforwards 6,200    
Valuation allowance 1,600    
State and Local Jurisdiction      
Operating Loss Carryforwards [Line Items]      
Operating loss carryforwards 102,000    
Valuation allowance $ 58,600