Note 10 - Income Taxes - Provision for Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Current:
Federal	$ 0	$ 0
State	45	24
Total current	45	24
Deferred:
Federal	0	0
State	0	0
Total deferred	0	0
Income tax expense from continuing operations	$ 45	$ 24