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Note 7 - Investments, Including Investments Accounted for Using the Equity Method - Schedule of Investments (Details) - USD ($)	Sep. 30, 2025	Dec. 31, 2024
Short-term Investments	$ 30,543,123	$ 44,953,337
Long-term investments	57,643,117	74,080,331
U.S. Treasury Notes and Corporate Bonds [Member]
Short-term Investments	18,886,257	22,411,583
U.S. Treasury Securities Held To Maturity [Member]
Long-term investments	4,760,546	4,736,409
Common Stock Warrants of Sky Harbour Group Corporation [Member]
Short-term Investments	11,656,866	22,541,754
Special Purpose Entities [Member]
Long-term investments	30,475,392	46,936,743
Preferred Stock [Member]
Long-term investments	348,694	348,694
My Bundle TV Inc. [Member]
Long-term investments	3,000,000	3,000,000
Voting Common Stock of Privately Held Company CB&T Holding Corporation [Member]
Long-term investments	$ 19,058,485	$ 19,058,485

X

- Definition

The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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- Definition

Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
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-Section S99
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