Note H - Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Balance at January 1	$ 2,458	$ 2,375
Increases for tax positions taken related to the current year	544	628
Increases for tax positions taken related to prior years	70	32
Lapse of statute of limitations	(530)	(577)
Settlements	(61)	0
Balance at December 31	$ 2,481	$ 2,458