Note 13 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Operating Loss Carryforwards	$ 175,400
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	26,100
Income Tax Expense (Benefit), Total	$ 0	$ 0
Open Tax Year	2019 2020 2021 2022