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Prepayments, Deposits and Other Receivables - Schedule of Prepayments, Deposits and Other Receivables (Detail) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Jan. 01, 2021
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Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |  |  |  |
Consideration receivables on disposal of investments to independent third parties |  | $ 46,408 |  |
Consideration receivable on disposal of subsidiaries to independent third parties (Note 5 C) | $ 10,000 | 44,885 |  |
Receivables from former subsidiaries |  | 24,020 |  |
Prepayments | 2,661 | 1,814 | $ 2,658 |
Deposits | 337 | 115 | 66 |
Other receivables | 3,939 | 7,482 | 87 |
Less: impairment loss provided under expected credit loss model | (501) | (501) | 0 |
Prepaid Expense and Other Assets, Current | $ 16,436 | $ 124,223 | $ 2,811 | $ 3,210

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