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Note 8 - Investments, Including Investments Accounted for Using the Equity Method - Reconciliation of the Company's Investments in Equity Affiliates (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Beginning of period	$ 20,913,896	$ 771,805	$ 771,805
Additional investment in unconsolidated affiliates	0		16,000,000
Distributions received	(1,598,623)		(1,433,480)
Reclassificaton of investment in affiliate to marketable securities	(12,880,147)		0
Reclassificaton of investment in affiliate to marketable securities	12,880,147		0
Equity in income of unconsolidated affiliates	140,297	$ 465,665	5,575,571
End of period	$ 6,575,423		$ 20,913,896

X

- Definition

Represents the reclassification of investment in affiliate to marketable securities.

+ References

No definition available.

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- Definition

Amount of income (loss) for proportionate share of equity method investee's income (loss).

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- Definition

The increase (decrease) during the reporting period in receivables to be collected from an entity that is controlling, under the control of, or within the same control group as the reporting entity by means of direct or indirect ownership.

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Amount of investment in equity method investee and investment in and advance to affiliate.

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The cash outflow associated with the acquisition of or advances to an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, and joint venture or equity method investment) or the acquisition of an additional interest in a subsidiary (controlled entity).

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