Note 8 - Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Marketable Securities [Table Text Block]

	December 31,
		2023		2022
Marketable securities:
Amortized cost	$	40,110	$	87,411
Unrealized gains, net		289,947		510,321
Total fair value	$	330,057	$	597,732

Gain (Loss) on Securities [Table Text Block]

	Year Ended December 31,
	2023		2022			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

	Year Ended December 31,
	2023		2022			2021
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	)		-
Unrealized gain/(loss) related to marketable securities still held	$	31,876	$	(330,628	)	$	505,163