Note 11 - Income Taxes - Components of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Current
Federal	$ 0	$ 0
State	0	3
Foreign	0	0
Total current	0	3
Deferred
Federal	0	0
State	0	0
Foreign	0	0
Total deferred	0	0
Total provision for income taxes	$ 0	$ 3