Note A - Summary of Significant Accounting Policies - Summary of Marketable Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Amortized Cost	$ 4,965	$ 26,428
Fair Value	5,010	26,454
Gross Unrealized Gains	45	58
Gross Unrealized Losses	0	31
Certificates of Deposit [Member]
Amortized Cost	4,965	21,305
Fair Value	5,010	21,331
Gross Unrealized Gains	45	58
Gross Unrealized Losses	$ 0	31
Variable Rate Demand Obligation [Member]
Amortized Cost		5,123
Fair Value		$ 5,123