Note 10 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Deferred Tax Assets, Valuation Allowance	$ 22,469	$ 20,808
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount	0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	200	200
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	0	$ 0
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	14,500
Foreign Tax Authority [Member]
Operating Loss Carryforwards	$ 41,200