Note 9 - Leases - Lease Right-of-use Assets and Lease Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Operating lease right-of-use assets, net	$ 82	$ 105
Current portion of operating lease liabilities	83	98
Operating lease liabilities	3	13
Total operating lease liabilities	$ 86	$ 111