| Leases |
Leases Supplemental balance sheet information related to operating leases was as follows: | | | | | | | | | | | As of December 31, | | | 2024 | 2025 | | US$ | US$ | | Operating Leases | | | | Operating lease right-of-use assets | 18,206 | | 16,770 | | | Total operating lease assets | 18,206 | | 16,770 | | | | | | Operating lease liabilities, current | 5,611 | | 4,983 | | | Operating lease liabilities, non-current | 16,696 | | 15,696 | | | Total operating lease liabilities | 22,307 | | 20,679 | |
The components of lease costs were as follows: | | | | | | | | | | | | | | | | | | | | Year ended December 31, | | 2023 | | 2024 | | 2025 | | US$ | | US$ | | US$ | | Operating lease costs | 6,751 | | | 7,180 | | | 6,060 | | | Short-term lease costs | 518 | | | 445 | | | 73 | | | Total | 7,269 | | | 7,625 | | | 6,133 | |
The lease costs were allocated as follows: | | | | | | | | | | | | | | | | | | | | Year ended December 31, | | 2023 | | 2024 | | 2025 | | US$ | | US$ | | US$ | | Selling, general and administrative expenses | 3,990 | | | 4,366 | | | 3,265 | | | Research and development expenses | 3,279 | | | 3,259 | | | 2,868 | | | Total | 7,269 | | | 7,625 | | | 6,133 | |
Supplemental cash flow information related to operating leases was as follows: | | | | | | | | | | | | | | | | | | | | Year ended December 31, | | 2023 | | 2024 | | 2025 | | US$ | | US$ | | US$ | | Cash paid for amounts included in the measurement of lease liabilities | | | | | | | Operating cash flows from operating leases | 4,406 | | | 5,422 | | | 6,112 | | | | | | | | | | Right-of-use assets obtained in exchange for lease obligations | | | | | | | Operating leases | 7,918 | | | 3,952 | | | 3,494 | |
Weighted average remaining lease term and weighted average discount rate for leases are as follows: | | | | | | | | | | | | | | | | | | | | | | Year ended December 31, | | | 2023 | | 2024 | | 2025 | | Weighted average remaining lease term (years): | | | | | | | | Operating leases | | 6.14 | | 5.59 | | 5.33 | | | | | | | | | Weighted average discount rate: | | | | | | | | Operating leases | | 8.65% | | 8.06% | | 8.34% |
Maturities of operating lease liabilities were as follows: | | | | | | | | As of December 31, 2025 | | US$ | | 2026 | 5,413 | | | 2027 | 5,350 | | | 2028 | 4,352 | | | 2029 | 3,475 | | | 2030 | 3,241 | | | 2031 and thereafter | 3,741 | | | Total undiscounted lease payments | 25,572 | | | Less imputed interest | (4,893) | | | Present value of lease liabilities | 20,679 | | | Operating lease liabilities, current | 4,983 | | | Operating lease liabilities, non-current | 15,696 | |
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