Note 8 - Marketable Securities - Net Gain (Loss) of Investment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Gain/(loss) on marketable securities, net	$ 21,262	$ (315,508)	$ 505,163
Dividend income (included in Other income, net and Special dividend income)	202,749	18,002	16,958
Gain/(loss) on marketable securities, net	21,262	(315,508)	505,163
Less: Net gain/(loss) recognized related to marketable securities sold	10,614	(15,120)	0
Unrealized gain/(loss) related to marketable securities still held	$ 31,876	$ (330,628)	$ 505,163