Note 4 - Summary of Significant Accounting Policies - Operating Lease Expenses and Supplemental Information (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Long-term operating lease contracts | $ 13 | $ 13 | $ 25 | $ 25 |
| Operating cash flows used for operating leases (US$’000) | 21 | 23 | ||
| Right-of-use assets obtained in exchange for new lease liabilities (US$’000) | 0 | 86 | ||
| Short-term operating lease contracts | $ 0 | $ 1 | $ 0 | $ 2 |
| Weighted-average remaining lease term (years) (Year) | 6 months | 6 months | ||
| Weighted-average discount rate | 6.00% | 6.00% | 6.00% | 6.00% |
| Total | $ 13 | $ 14 | $ 25 | $ 27 |
| X | ||||||||||
- Definition Amount of long-term lease cost, excluding expense for lease with term of more than one month. No definition available.
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| X | ||||||||||
- Definition Amount of lease cost recognized by lessee for lease contract. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Weighted average discount rate for operating lease calculated at point in time. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of increase in right-of-use asset obtained in exchange for operating lease liability. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of short-term lease cost, excluding expense for lease with term of one month or less. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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