Note F - Cash, Cash Equivalents And Marketable Securities - Summary of Marketable Securities (Details) - USD ($) $ in Thousands	Mar. 30, 2025	Dec. 31, 2024
Amortized Cost	$ 4,468	$ 4,965
Fair Value	4,496	5,010
Gross Unrealized Gains	28	45
Gross Unrealized Losses	0	0
Certificates of Deposit [Member]
Amortized Cost	4,468	4,965
Fair Value	4,496	5,010
Gross Unrealized Gains	28	45
Gross Unrealized Losses	$ 0	$ 0