Note 9 - Fair Value Measurements - Schedule of Fair Value Reported on a Recurring Basis (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Equity Securities	$ 9,142,357	$ 2,536,482
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Equity Securities	9,142,357	2,536,482
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Equity Securities		1,515,234
Domestic Equities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Equity Securities	6,822,808	1,506,514
US Treasury Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
U.S. Treasury Bills Maturing in 2021		1,515,234
International Equities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Equity Securities	1,856,904	630,494
Other [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Equity Securities	$ 462,645	$ 399,474