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Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Taxes [Line Items]      
Amount expected to be utilized of tax credit carry forwards expiring in the and beyond the stated year $ 1,200    
Valuation allowance 21,618 $ 23,072  
Unrecognized tax benefits, impact on effective tax rate 9,300 8,300 $ 2,800
Accrued interest and penalties 500 300 $ 100
Increase (decrease) in income tax expense 200 $ 200  
Foreign Countries      
Income Taxes [Line Items]      
Valuation allowance 19,900    
Foreign Countries      
Income Taxes [Line Items]      
Net operating loss carryforwards, foreign 21,700    
California enterprise zone      
Income Taxes [Line Items]      
California enterprise zone tax credits 3,000    
California enterprise zone | California Enterprise Zone      
Income Taxes [Line Items]      
Valuation allowance $ 1,800