Note 8 - Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Balance, beginning of year	$ 678	$ 637
Additions for tax positions of prior years	88
Additions for tax positions of prior years		(31)
Additions based on tax positions related to the current year	0	72
Balance, end of year	$ 766	$ 678