Note 6 - Income Taxes (Details Textual) - USD ($) Pure in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Tax Expense (Benefit)	$ 0		$ 0		$ 0	$ 0
Effective Income Tax Rate Reconciliation, Percent		0.00%		0.00%