Note 16 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Capitalized Costs, Research and Development	$ 23,400
Finite-Lived Intangible Asset, Useful Life (Year)	13 years	13 years
Unrecognized Tax Benefits, Ending Balance	$ 0
Open Tax Year	2019 2020 2021 2022
Domestic Tax Authority [Member] | In Process Research and Development [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	5 years
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards	$ 0
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Research Tax Credit Carryforward [Member]
Operating Loss Carryforwards	400
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	3,100
State and Local Jurisdiction [Member] | Research Tax Credit Carryforward [Member]
Operating Loss Carryforwards	500
Foreign Tax Authority [Member]
Deferred Tax Liabilities, Undistributed Foreign Earnings	$ 500
Foreign Tax Authority [Member] | In Process Research and Development [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	15 years
Foreign Tax Authority [Member] | Ministry of Economic Affairs and Finance, Italy [Member]
Operating Loss Carryforwards	$ 6,100
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ (900)