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Financial Assets at Fair Value Through Profit or Loss and Stock Loan - Summary of Financial Assets at Fair Value Through Profit or Loss and Stock Loan (Detail) - USD ($) | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Jan. 01, 2021
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Financial Assets At Fair Value Through Profit Or Loss And Stock Loan [Line Items] |  |  |  |
Financial assets at fair value through profit or loss, other than financial asset at fair value through profit or loss under stock loan | $ 66,290,000 | $ 173,589,000 | $ 330,248,000 |
Financial assets at fair value through profit or loss under stock loan | 13,317,000 | 21,748,000 | 27,104,000 |
Total financial assets at fair value through profit or loss | 79,607,000 | 195,337,000 | 357,352,000 | $ 283,000,000
Listed equity shares, at quoted price |  |  |  |
Listed equity shares, at quoted price | 72,053,000 | 110,474,000 | 135,373,000 |
Unlisted equity shares |  |  |  |
Unlisted equity shares | 2,005,000 | 71,615,000 | 221,979 |
Movie income right investments | 5,549,000 | 13,248,000 |  |
Investment A [Member] |  |  |  |
Listed equity shares, at quoted price |  |  |  |
Listed equity shares, at quoted price | 54,494,000 | 89,254,000 | 135,373,000 |
Investment B [Member] |  |  |  |
Listed equity shares, at quoted price |  |  |  |
Listed equity shares, at quoted price | 17,558,000 | 21,219,000 |  |
Investment C [Member] |  |  |  |
Listed equity shares, at quoted price |  |  |  |
Listed equity shares, at quoted price | 1,000 | 1,000 |  |
Investment D [Member] |  |  |  |
Unlisted equity shares |  |  |  |
Unlisted equity shares |  | 69,635,000 | 61,657,000 |
Investment E [Member] |  |  |  |
Unlisted equity shares |  |  |  |
Unlisted equity shares | 1,517,000 | 1,492,000 | 1,481,000 |
Investment F [Member] |  |  |  |
Unlisted equity shares |  |  |  |
Unlisted equity shares | 200,000 | 200,000 |  |
Investment G [Member] |  |  |  |
Unlisted equity shares |  |  |  |
Unlisted equity shares | 288,000 | $ 288,000 |  |
Investment H [Member] |  |  |  |
Unlisted equity shares |  |  |  |
Unlisted equity shares | 0 |  | 11,056,000 |
Investment I [Member] |  |  |  |
Unlisted equity shares |  |  |  |
Unlisted equity shares | 0 |  | 2,816,000 |
Investment J [Member] |  |  |  |
Unlisted equity shares |  |  |  |
Unlisted equity shares | 0 |  | 143,689,000 |
Investment K [Member] |  |  |  |
Unlisted equity shares |  |  |  |
Unlisted equity shares | $ 0 |  | $ 1,280,000 |

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