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Significant Accounting Policies - Summary of Projected Benefit Obligation (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]    
Projected benefit obligation at beginning of year $ 1,882 $ 1,245
Service cost 738 504
Interest cost 30 26
Actuarial (gain)/loss 492 499
Benefits paid (400) (159)
Other (273) (190)
Foreign currency translation adjustment 323 (43)
Projected benefit obligation at end of year $ 2,792 $ 1,882