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Financial instruments-Risk management and fair value - Risk Management and Fair Value - Movement in Allowance for Impairment for Short and Long-term Investments at Amortized Cost (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Disclosure of credit risk exposure [abstract]    
Balance at beginning of year $ (2,955) $ (1,312)
(Additions)/Reversal 697 (1,643)
Balance at end of year $ (2,258) $ (2,955)