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Income Taxes - Summary of Supplemental Balance Sheet Information Related to Deferred Tax Assets (Detail) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Operating Loss Carryforwards [Line Items]    
Deferred Tax Assets $ 59,767 $ 56,177
Valuation Allowance (52,194) (48,616)
Deferred Tax Assets, net 7,573 7,561
Domestic [Member]    
Operating Loss Carryforwards [Line Items]    
Deferred Tax Assets 50,164 46,266
Valuation Allowance (50,164) (46,266)
International [Member]    
Operating Loss Carryforwards [Line Items]    
Deferred Tax Assets 9,603 9,911
Valuation Allowance (2,030) (2,350)
Deferred Tax Assets, net $ 7,573 $ 7,561