Principal Accounting Policies - Schedule Of Fair Value, Assets Measured On Recurring Basis, Unobservable Input Reconciliation (Detail) - Available for sale debt securities [Member] - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||
| Fair value of Level 3 investments as at December 31, 2020 and 2021 | $ 5,196 | $ 0 |
| New addition | 5,000 | |
| Interest income and change in fair value of the investments | (887) | 196 |
| Fair value of Level 3 investments as at December 31, 2021 and 2022 | $ 4,309 | $ 5,196 |