Note 12 - Income Taxes (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%
Domestic Tax Jurisdiction [Member]
Operating Loss Carryforwards	$ 67.5
Operating Loss Carryforwards that Do Not Expire	8.3
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	81.4
Operating Loss Carryforwards that Do Not Expire	$ 8.3