Note 6 - Fair Value of Financial Instruments - Liabilities Measure on Recurring Basis (Details) - Fair Value, Recurring [Member] - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Derivative liabilities	$ 41	$ 45
Notes Warrants [Member]
Derivative liabilities	37	41
Additional Warrants [Member]
Derivative liabilities	$ 4	$ 4