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Note 8 - Investments, Including Investments Accounted for Using the Equity Method - Schedule of Investments (Details) - USD ($) | Dec. 31, 2023 | Dec. 31, 2022
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Short-term Investments | $ 24,753,469 | $ 6,288,828
Long-Term Investments | 87,104,272 | 26,136,636
Common Stock Warrants of Sky Harbour Group Corporation [Member] |  |
Short-term Investments | 5,558,241 | 1,531,604
My Bundle TV Inc. [Member] |  |
Long-Term Investments | 3,000,000 | 0
Voting Common Stock of Privately Held Company CB&T Holding Corporation [Member] |  |
Long-Term Investments | 19,058,485 | 19,058,485
U.S. Treasury Notes and Corporate Bonds [Member] |  |
Short-term Investments | 19,195,228 | 4,757,224
US Treasury Securities [Member] |  |
Long-Term Investments | 0 | 6,729,457
Special Purpose Entities [Member] |  |
Long-Term Investments | 64,697,093 | 0
Preferred Stock [Member] |  |
Long-Term Investments | $ 348,694 | $ 348,694

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