Note 6 - Investments - Gains and Losses on Equity Securities (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Net gains and losses recognized during the period on equity securities	$ 43	$ (411)
Less: Net gains and losses realized during the period on equity securities	(30)	0
Unrealized net losses recognized during the period on equity securities still held at the reporting date	$ 13	$ (411)