Note 3 - Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Current:
Federal	$ 0	$ 0
State	(19)	(6)
Foreign	(55)	(10)
Total current	(74)	(16)
Deferred:
Federal	2	(19)
State	3	(19)
Total deferred	5	(38)
Income tax expense	$ (69)	$ (54)