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Property, Equipment and Software, net | 12 Months Ended
--- | ---
Dec. 31, 2023
Property, Equipment and Software, net |
Property, Equipment and Software, net | 8. Property, Equipment and Software, net Property, equipment and software consist of the following: ​
​ | ​ | ​ | ​ | ​
​ |  | As of December 31,
​ |  | 2022 |  | 2023
​ | ​ | US$ | ​ | US$
Cost: |  |  |  |
Leasehold improvements |  | 3,389 |  | 3,568
Computers and electronic equipment |  | 7,513 |  | 7,273
Office equipment |  | 229 |  | 307
Software |  | 726 |  | 834
Construction in progress |  | 59 |  | —
Total cost |  | 11,916 |  | 11,982
Less: Accumulated depreciation and amortization |  | (8,089) |  | (9,393)
Total property, equipment and software, net |  | 3,827 |  | 2,589
​ Depreciation expense was US$3,369, US$3,443 and US$2,449 for the years ended December 31, 2021, 2022 and 2023, respectively.

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