Note 10 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 709,000	$ 299,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued		$ 31,000
Open Tax Year	2016 2017 2018 2019 2020 2021 2022
Domestic Tax Authority [Member]
Operating Loss Carryforwards	$ 33,500,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	$ 25,700,000