Note G - Dividend Payment (Details Textual) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended		9 Months Ended
	Sep. 13, 2022	Mar. 21, 2022	Jul. 22, 2021	Oct. 01, 2022	Oct. 02, 2021	Oct. 01, 2022	Oct. 02, 2021
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)	$ 0.15	$ 0.15	$ 0.15
Dividends, Common Stock, Cash	$ 2,000	$ 2,000	$ 2,000	$ 2,039	$ 1,917	$ 6,115	$ 5,804