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INVESTMENTS (Tables) | 12 Months Ended
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Dec. 31, 2023
INVESTMENTS [Abstract] |
Short-term and Long-term Investments | The following table sets forth a breakdown of the categories of short-term and long-term investments held by the Company:
|  | As of December 31, |
|  | 2022 |  |  | 2023 |
|  | $ |  |  | $ |
Short-term investments |  |  |  |  |  |  |  |
Debt securities: |  |  |  |  |  |  |  |
Held-to-maturity |  |  | 557,249 |  |  |  | 1,731,154 |
Available-for-sale |  |  | 304,453 |  |  |  | 792,908 |
Equity securities |  |  | 2,556 |  |  |  | 23,582 |
|  |  | 864,258 |  |  |  | 2,547,644 |
Long-term investments |  |  |  |  |  |  |  |
Debt securities: |  |  |  |  |  |  |  |
Held-to-maturity |  |  | 64,790 |  |  |  | 49,726 |
Available-for-sale |  |  | 292,724 |  |  |  | 3,405,098 |
Equity securities |  |  | 521,742 |  |  |  | 612,729 |
Equity method investments |  |  | 196,104 |  |  |  | 195,009 |
Investments carried at fair value |  |  | 178,233 |  |  |  | – |
|  |  | 1,253,593 |  |  |  | 4,262,562 |
Impairment Losses Included in Net Investment Loss | Impairment losses are included in net investment loss in the consolidated statements of operations:
|  | Years ended December 31, |
|  | 2021 |  |  | 2022 |  |  | 2023 |
|  | $ |  |  | $ |  |  | $ |
Impairment losses |  |  |  |  |  |  |  |  |  |  |  |
Non-marketable equity securities |  |  | – |  |  |  | 104,645 |  |  |  | 86,076 |
Equity method investments |  |  | – |  |  |  | 4,201 |  |  |  | 10,608 |
Debt Securities and Investments Carried at Fair Value | The following table summarizes the cost or amortized cost, gross unrecognized gains and losses, gross unrealized gains and losses, and fair value of the Company’s debt securities and investments carried at fair value as of December 31, 2022 and 2023:
|  | As of December 31, 2022 |
|  | Cost or amortized cost |  |  | Gross unrecognized gains |  |  | Gross unrecognized losses |  |  | Gross unrealized gains |  |  | Gross unrealized losses |  |  | Fair value |
|  | $ |  |  | $ |  |  | $ |  |  | $ |  |  | $ |  |  | $ |
Short-term investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Held-to-maturity |  |  | 557,249 |  |  |  | 4 |  |  |  | (2 | ) |  |  | – |  |  |  | – |  |  |  | 557,251 |
Available-for-sale |  |  | 304,649 |  |  |  | – |  |  |  | – |  |  |  | 26 |  |  |  | (222 | ) |  |  | 304,453 |
Long-term investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Held-to-maturity |  |  | 64,790 |  |  |  | 551 |  |  |  | (756 | ) |  |  | – |  |  |  | – |  |  |  | 64,585 |
Available-for-sale |  |  | 301,020 |  |  |  | – |  |  |  | – |  |  |  | 151 |  |  |  | (8,447 | ) |  |  | 292,724 |
Investments carried at fair value |  |  | 225,709 |  |  |  | – |  |  |  | – |  |  |  | 27,071 |  |  |  | (74,547 | ) |  |  | 178,233 |
|  |  | 1,453,417 |  |  |  | 555 |  |  |  | (758 | ) |  |  | 27,248 |  |  |  | (83,216 | ) |  |  | 1,397,246 |
|  | As of December 31, 2023 |
|  | Cost or amortized cost |  |  | Gross unrecognized gains |  |  | Gross unrecognized losses |  |  | Gross unrealized gains |  |  | Gross unrealized losses |  |  | Fair value |
|  | $ |  |  | $ |  |  | $ |  |  | $ |  |  | $ |  |  | $ |
Short-term investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Held-to-maturity |  |  | 1,731,154 |  |  |  | 9 |  |  |  | (23 | ) |  |  | – |  |  |  | – |  |  |  | 1,731,140 |
Available-for-sale |  |  | 792,431 |  |  |  | – |  |  |  | – |  |  |  | 885 |  |  |  | (408 | ) |  |  | 792,908 |
Long-term investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Held-to-maturity |  |  | 49,726 |  |  |  | 632 |  |  |  | (193 | ) |  |  | – |  |  |  | – |  |  |  | 50,165 |
Available-for-sale |  |  | 3,407,262 |  |  |  | – |  |  |  | – |  |  |  | 15,002 |  |  |  | (17,166 | ) |  |  | 3,405,098 |
|  |  | 5,980,573 |  |  |  | 641 |  |  |  | (216 | ) |  |  | 15,887 |  |  |  | (17,574 | ) |  |  | 5,979,311 |

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