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Accounts and Transactions with Related Parties - Summary of Key Management Personnel Compensation (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of transactions between related parties [abstract]      
Short-term employee benefits $ 3,177 $ 4,969 $ 6,104
Post-employment pension 61 95 117
Share-based payments 2,362 3,246 5,092
Total $ 5,600 $ 8,310 $ 11,313