Note 13- Income Taxes (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Operating Loss Carryforwards		$ 175.0
Domestic Tax Authority [Member] \| Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards	$ 175.1
Domestic Tax Authority [Member] \| Internal Revenue Service (IRS) [Member] \| Research Tax Credit Carryforward [Member]
Tax Credit Carryforward, Amount Expired During Period	9.1
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	$ 20.1