Note 7 - Investments in Equity Securities (Tables)

3 Months Ended

Mar. 31, 2021

Notes Tables

Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block]

	March 31, 2021		December 31, 2020
Fair value of equity securities	$	1,644,975	$	1,534,400
Cost basis		826,224		949,293
Unrealized gain (loss) on equity securities	$	818,751	$	585,107

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, 2021	$	1,644,975	$	-	$	-	$	1,644,975
Common stock as of December 31, 2020	$	1,534,400	$	-	$	-	$	1,534,400