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Goodwill, Intangible Assets and Acquisitions - Changes in the Group's Goodwill (Details) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) item | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Changes in the Group's goodwill by segment |  |  |  |
Balance at the beginning of the year | $ 120,151 | $ 120,151 | $ 130,405 | $ 61,712
Currency translation adjustment |  | (2,384) | (10,254) | 2,914
Balance at the end of the year |  | $ 166,436 | 120,151 | 130,405
Number of reporting units | item |  | 2 |  |
Impairment charge of goodwill recognized | 0 | $ 0 |  |
Wuta application |  |  |  |
Changes in the Group's goodwill by segment |  |  |  |
Acquisition |  |  |  | 51,034
E-sports team |  |  |  |
Changes in the Group's goodwill by segment |  |  |  |
Acquisition |  |  |  | 14,745
Xi'an Yunrui Network Technology Co Ltd |  |  |  |
Changes in the Group's goodwill by segment |  |  |  |
Acquisition |  | 48,669 |  |
Advertising and marketing revenues |  |  |  |
Changes in the Group's goodwill by segment |  |  |  |
Balance at the beginning of the year | 77,161 | 77,161 | 83,746 | 30,899
Currency translation adjustment |  | (2,331) | (6,585) | 1,813
Balance at the end of the year |  | 74,830 | 77,161 | 83,746
Advertising and marketing revenues | Wuta application |  |  |  |
Changes in the Group's goodwill by segment |  |  |  |
Acquisition |  |  |  | 51,034
Advertising and marketing revenues | E-sports team |  |  |  |
Changes in the Group's goodwill by segment |  |  |  |
Acquisition |  |  |  | 0
Advertising and marketing revenues | Xi'an Yunrui Network Technology Co Ltd |  |  |  |
Changes in the Group's goodwill by segment |  |  |  |
Acquisition |  | 0 |  |
Value-added services revenues |  |  |  |
Changes in the Group's goodwill by segment |  |  |  |
Balance at the beginning of the year | $ 42,990 | 42,990 | 46,659 | 30,813
Currency translation adjustment |  | (53) | (3,669) | 1,101
Balance at the end of the year |  | 91,606 | $ 42,990 | 46,659
Value-added services revenues | Wuta application |  |  |  |
Changes in the Group's goodwill by segment |  |  |  |
Acquisition |  |  |  | 0
Value-added services revenues | E-sports team |  |  |  |
Changes in the Group's goodwill by segment |  |  |  |
Acquisition |  |  |  | $ 14,745
Value-added services revenues | Xi'an Yunrui Network Technology Co Ltd |  |  |  |
Changes in the Group's goodwill by segment |  |  |  |
Acquisition |  | $ 48,669 |  |

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