Note 9 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024
Stock-based compensation (c)	[1]	$ 61	$ 36
Restricted Stock [Member]
Stock-based compensation (c)		$ 61	$ 36

[1] Stock-based compensation is included within the Compensation expense caption.