Note 4 - Summary of Significant Accounting Policies - Operating Lease Expenses and Supplemental Information (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Long-term operating lease contracts	$ 12	$ 22
Operating cash flows used for operating leases (US$’000)	11	25
Short-term operating lease contracts	1	12
Right-of-use assets obtained in exchange for new lease liabilities (US$’000)	87	0
Total	$ 13	$ 34
Weighted-average remaining lease term (years) (Year)	9 months
Weighted-average discount rate	6.00%	0.00%

Amount of long-term lease cost, excluding expense for lease with term of more than one month.

No definition available.

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- Definition

Amount of lease cost recognized by lessee for lease contract.

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- Definition

Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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- Definition

Weighted average discount rate for operating lease calculated at point in time.

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- 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.

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- Definition

Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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- Definition

Amount of short-term lease cost, excluding expense for lease with term of one month or less.

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