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Note 8 - Investments, Including Investments Accounted for Using the Equity Method - Marketable Equity Securities and Trading Securities (Details) - USD ($) | Dec. 31, 2022 | Dec. 31, 2021
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Marketable equity securities, Cost | $ 9,665,100 | $ 20,893,647
Marketable equity securities, Gross Unrealized Gain (Loss) | (896,162) | 49,723,850
Marketable equity securities | $ 8,768,938 | $ 70,617,497

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