Note 7 - Income Taxes - Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Pre-tax loss as reported	$ (7,343)	$ (7,957)
U.S. statutory tax rate	21.00%	21.00%
Theoretical tax expense	$ (1,542)	$ (1,671)
Permanent differences	2	2
Change in valuation allowance	1,540	1,669
Income tax expense	$ 0	$ 0