Note P - Fair Value Measurements and Disclosures - Assets Measured at Fair Value on Non-recurring Basis of Impairment Loans (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Impaired loans, fair value	$ 6	$ 1,026
Fair Value, Inputs, Level 1 [Member]
Impaired loans, fair value	0	0
Fair Value, Inputs, Level 2 [Member]
Impaired loans, fair value	0	0
Fair Value, Inputs, Level 3 [Member]
Impaired loans, fair value	$ 6	$ 1,026