Note 4 - Summary of Significant Accounting Policies - Schedule of Future Operating Lease Payments (Details) - USD ($) $ in Thousands	Jun. 30, 2025		Mar. 31, 2025	Dec. 31, 2024
Nine months ending December 31, 2025	$ 25
Year ending December 31,-2026	50
Total undiscounted lease payments	75
Less: imputed interest	(3)
Total operating lease liabilities as of June 30, 2025	72
Operating lease liabilities *	47	[1]	$ 70	$ 0	[1]
Operating lease liabilities non-current portion	$ 25			$ 0

[1] Liabilities recognized as a result of consolidating these VIEs do not represent additional claims on the Company’s general assets (Note 2).