Note 12 - Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Federal	$ 0	$ 0
State	0	0
Foreign	196	239
Federal	0	0
State	0	0
Foreign	118	79
Total income tax expense	$ 314	$ 318