Note O - Income Taxes - Provision for Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Federal	$ 0	$ 0	$ 0
State	1	1	2
Foreign	8	0	0
Total	9	1	2
Federal	0	0	0
State	0	0	0
Foreign	0	0	0
Total	0	0	0
Income tax (benefit) expense	$ 9	$ 1	$ 2