Note 7 - Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Start-up costs	$ 9,621	$ 7,727
Federal net operating loss carryforwards	11,598	11,024
174 R&D Carryforward	6,636	3,572
State tax loss carryforwards	258	237
Foreign net operating loss carryforwards	377	161
Fixed Assets	(9)	0
Tax credit carryforward	1,919	1,335
ROU Liability	123	96
Deferred compensation	1,879	1,630
Total deferred tax assets	32,420	25,782
Less valuation allowance	(32,308)	(25,696)	$ (18,823)
Net deferred tax assets	112	86
ROU Asset	(112)	(86)
Total deferred tax liabilities	(112)	(86)
Net deferred taxes	$ 0	$ 0