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Operating Leases | 12 Months Ended
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Dec. 31, 2023
Operating Leases |
Operating Leases | 10. Operating Leases The Company has operating leases primarily for office and operation space. The Company’s operating lease arrangements have remaining terms of one year to five years with no variable lease costs. Operating lease costs were US$8,231, US$6,626 and US$4,530 for the years ended December 31, 2021, 2022 and 2023, respectively.The components of lease expenses were as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ |  | 2021 |  | 2022 |  | 2023
​ | ​ | US$ | ​ | US$ | ​ | US$
Lease cost: |  | ​ |  | ​ |  | ​
Amortization of right-of-use assets |  | 6,981 |  | 4,766 |  | 4,100
Interest of lease liabilities |  | 749 |  | 692 |  | 354
Expenses for short-term lease within 12 months |  | 501 |  | 1,168 |  | 76
Total lease cost |  | 8,231 |  | 6,626 |  | 4,530
​ Supplemental cash flow information related to leases were as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ |  | 2021 |  | 2022 |  | 2023
​ | ​ | US$ | ​ | US$ | ​ | US$
Cash paid for amounts included in the measurement of lease liabilities |  | 7,920 |  | 5,554 |  | 4,134
Right-of-use assets obtained in exchange for operating lease liabilities |  | 23,810 |  | 884 |  | 2,727
​ Supplemental consolidated balance sheet information related to leases were as follows: ​
​ | ​ | ​ | ​ | ​
​ |  | As of December 31,
​ |  | 2022 |  | 2023
​ | ​ | US$ | ​ | US$
Right-of-use assets |  | 9,736 |  | 7,647
Operating lease liabilities-current |  | 3,850 |  | 3,883
Operating lease liabilities-non-current |  | 5,292 |  | 3,904
Total lease liabilities |  | 9,142 |  | 7,787
Weighted-average remaining lease term |  |  |  |
Operating leases |  | 2.73 years |  | 2.12 years
Weighted-average discount rate |  |  |  |
Operating lease |  | 4.75% per annum |  | 4.75% per annum
​ Maturities of lease liabilities were as follows: ​
​ | ​ | ​ | ​ | ​
​ |  | As of December 31,
​ |  | 2022 |  | 2023
​ | ​ | US$ | ​ | US$
2023 |  | 4,200 |  | —
2024 |  | 2,835 |  | 4,237
2025 |  | 2,675 |  | 3,880
2026 | ​ | 46 | ​ | 124
2027 | ​ | 4 | ​ | 5
Total undiscounted lease payments |  | 9,760 |  | 8,246
Less: imputed interest |  | (618) |  | (459)
Total lease liabilities |  | 9,142 |  | 7,787
​

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- Definition The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//842-20/tableOfContent + Details
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