Note 11 - Income Taxes - Schedule of Income Tax Reconciliation (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2025		Dec. 31, 2024
U.S. federal statutory rate		$ (1,334)		$ (847)
U.S. federal statutory rate, percent		21.00%
State and local taxes, net of federal effects (1)		$ 1	[1]	(57)
State and local taxes, net of federal effects, percent	[1]	(0.01%)
Change in valuation allowance		$ 1,259		1,026
Change in valuation allowance, percent		(19.82%)
Nontaxable or nondeductible items		$ 54
Nontaxable or nondeductible items, percent		(0.85%)
Other Reconciling Items		$ 22		56
Other Reconciling Items		(0.35%)
Income tax expense		$ 2		10
Effective tax rates, percent		(0.03%)
U.S Federal and State NOL Carryforward adjustment for expired NOLs and other				62
Stock Compensation Adjust for Expired Options				67
State Taxes, Change in Apportionment Rate				$ (297)

[1] The states and local jurisdictions that contribute to the majority (greater than 50%0 of the tax effect in this category include California, Colorado, and Pennsylvania.