Note 9 - Income Taxes - Reconciliation of the Beginning and Ending Liability for Gross Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Balance	$ 1,160	$ 1,036
Additions for tax positions in current year	319	298
Reductions for tax positions of prior years	(173)	(174)
Reductions for payments for tax positions of prior years	(166)	0
Balance at end of year	$ 1,140	$ 1,160