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Income Taxes - Net Operating Loss Carryforwards (Detail)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
USD ($)
U.S. Federal and state income tax  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforward, amount $ 85,828
U.S. Federal and state income tax | Minimum  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforward, year of expiration 2020
U.S. Federal and state income tax | Maximum  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforward, year of expiration 2039
Foreign  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforward, amount $ 13,153
Foreign | Minimum  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforward, year of expiration 2020
Foreign | Maximum  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforward, year of expiration 2024
Indefinite  
Operating Loss Carryforwards [Line Items]  
Operating loss carryforward, amount $ 109,665
Operating loss carryforward, year of expiration Indefinite