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Note F - Cash, Cash Equivalents And Marketable Securities - Summary of Marketable Securities (Details) - USD ($) $ in Thousands	Sep. 28, 2025	Dec. 31, 2024
Amortized Cost	$ 2,489	$ 4,965
Fair Value	2,501	5,010
Gross Unrealized Gains	12	45
Gross Unrealized Losses	0	0
Certificates of Deposit [Member]
Amortized Cost	2,489	4,965
Fair Value	2,501	5,010
Gross Unrealized Gains	12	45
Gross Unrealized Losses	$ 0	$ 0

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