Note G - Dividend Payment (Details Textual) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended		9 Months Ended
	Sep. 05, 2023	Jun. 19, 2023	Mar. 20, 2023	Sep. 30, 2023	Oct. 01, 2022	Sep. 30, 2023	Oct. 01, 2022
Common Stock, Dividends, Per Share, Cash Paid	$ 0.15	$ 0.15	$ 0.15
Dividends, Common Stock, Cash	$ 2,100	$ 2,100	$ 2,100	$ 2,060	$ 2,039	$ 6,180	$ 6,115