v3.26.1
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
Jun. 30, 2026
Dec. 31, 2025
Derivative liabilities $ 54 $ 45
Notes Warrants [Member]    
Derivative liabilities 54 41
Additional Warrants [Member]    
Derivative liabilities $ 0 $ 4