Note 4 - Summary of Significant Accounting Policies - Operating Lease Expenses and Supplemental Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Long-term operating lease contracts	$ 12	$ 0	$ 37	$ 22
Operating cash flows used for operating leases (US$’000)			36	25
Right-of-use assets obtained in exchange for new lease liabilities (US$’000)			87	0
Short-term operating lease contracts	$ 2	$ 4	$ 4	$ 34
Weighted-average remaining lease term (years) (Year)	1 year 3 months		1 year 3 months
Weighted-average discount rate	6.00%	0.00%	6.00%	0.00%
Total	$ 14	$ 4	$ 41	$ 56