Note 3 - Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Current:
Federal	$ 0	$ 0
State	(51)	(19)
Foreign	(22)	(55)
Total current	(73)	(74)
Deferred:
Federal	(2)	2
State	(2)	3
Total deferred	(4)	5
Income tax expense	$ (77)	$ (69)