Note 7 - Investments in Equity Securities (Tables)

3 Months Ended

Mar. 31, 2022

Notes Tables

Gain (Loss) on Securities [Table Text Block]

	BALANCE AT BEGINNING OF YEAR		ACQUISITIONS, DISPOSITIONS AND SETTLEMENTS		UNREALIZED GAINS (LOSSES) INCLUDED IN EARNINGS			REALIZED GAINS INCLUDED IN EARNINGS		BALANCE AT END OF PERIOD
December 31, 2021	$	1,534,400	$	19,698	$	(188,615	)	$	152,761	$	1,518,244
Year-to-date March 31, 2022		1,518,244		-		174,885			-		1,693,129

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

	Quoted Market Prices in Attractive Markets (Level 1)		Models with Significant Observable Market Parameters (Level 2)		Unobservable Inputs that are not Corroborated by Market Data (Level 3)		Total Carrying Value in the Balance Sheet
Common stock as of March 31, 2022	$	1,693,129	$	-	$	-	$	1,693,129
Common stock as of December 31, 2021	$	1,518,244	$	-	$	-	$	1,518,244