Note 7 - Investments in Equity Securities - Schedule of Fair Value of Investments (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Investments	$ 1,534,400
Reported Value Measurement [Member]
Investments		1,534,400
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]
Investments		1,534,400
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member]
Investments
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member]
Investments