Note 13 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	0	$ 0
Domestic Tax Authority [Member]
Operating Loss Carryforwards, Incurred Before the Closing Date	$ 4,200
Open Tax Year	2018 2019 2020 2021
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total	$ 6,100
Open Tax Year	2017 2018 2019 2020 2021