Note 8 - Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Federal	$ 0	$ 0
State	0	0
Foreign, tax expense	0	0
Total current	0	0
Federal, deferred	0	0
State, deferred	0	0
Foreign, deferred	0	0
Total deferred	0	0
Provision for income taxes	$ 0	$ 0