Note 9 - Income Taxes - Provision for Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Current:
Federal	$ 0	$ 0
State	(18)	45
Total current tax expense	(18)	45
Deferred:
Federal	0	0
State	0	0
Total deferred tax expense	0	0
Income tax expense	$ (18)	$ 45