Note 6 - Summary of Unrealized and Realized Gains and Losses Recognized in Net Income on Equity Securities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Equity Securities [Abstract]
Net (loss) gains recognized during the period on equity securities	$ 1,016	$ (54)	$ 1,363	$ (205)
Less: Net (losses) gains recognized during the period on equity securities sold during the period	0	519	377	311
Net unrealized gains (losses) recognized during the reporting period on equity securities still held at the reporting date	$ 1,016	$ (573)	$ 986	$ (516)