Note 7 - Investments in Equity Securities (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Gain (Loss) on Securities [Table Text Block]

					UNREALIZED			REALIZED
	BALANCE		ACQUISITIONS,		GAINS			GAINS			BALANCE
	AT		DISPOSITIONS		(LOSSES)			(LOSSES)			AT END
	BEGINNING		AND		INCLUDED			INCLUDED			OF
	OF YEAR		SETTLEMENTS		IN EARNINGS			IN EARNINGS			PERIOD
December 31, 2022	$	1,518,244	$	-	$	(860,273	)	$	-		$	657,971
Year-to-date December 31, 2023		657,971		-		53,614			(46,284	)		665,301

Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block]

					Unobservable
	Quoted		Models with		Inputs that
	Market		Significant		are not		Total
	Prices in		Observable		Corroborated		Carrying
	Attractive		Market		by Market		Value in the
	Markets		Parameters		Data		Balance
	(Level 1)		(Level 2)		(Level 3)		Sheet
Common stock as of December 31, 2023	$	665,301	$	-	$	-	$	665,301
Common stock as of December 31, 2022	$	657,971	$	-	$	-	$	657,971