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Bank Borrowings - Additional Information (Detail) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Jan. 01, 2021
--- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Amount of bank borrowing | $ 30,373 | $ 458 | $ 0 | $ 0
Collateral carrying amount | $ 69,562 |  |  |
Interest rate on borrowings | 1.65% |  |  |
Unsecured borrowings | $ 45,511 | 20,580 | 49,879 |
Bank borrowings | $ 65,793 | $ 20,122 | $ 49,879 |
Weighted average contractual interest rate | 5.60% | 6.30% | 2.10% |
Debt payable within five years | $ 30,373 | $ 458 | $ 0 |
Unsecured Debt [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate on borrowings | 0.25% |  |  |
Hong Kong dollars [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Amount of bank borrowing | $ 50,655 |  |  |
United States dollars [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Amount of bank borrowing | 15,000 |  |  |
Unsecured borrowings | $ 30,000 |  |  |

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