Note 9 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023
Stock-based compensation (c)	[1]	$ 36	$ 3
Restricted Stock [Member]
Stock-based compensation (c)		$ 36	$ 3

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