Note 9 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2023
Effective Income Tax Rate Reconciliation, Percent	(0.40%)	(0.40%)
Income Tax Expense (Benefit)	$ 91	$ 84
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	$ 0
Forecast [Member]
Effective Income Tax Rate Reconciliation, Percent			(0.40%)