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Note 8 - Investments, Including Investments Accounted for Using the Equity Method (As Restated) - Reconciliation of the Company's Investments in Equity Affiliates (Details) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Beginning of year     $ 118,218,389 $ 61,660,905 $ 61,660,905
Additional investments in unconsolidated affiliates     0   45,094,500
Distributions received     (207,641)   (642,511)
Reclassification of marketable securities to investment in affiliate     0   23,483
Transfer of interest     0   (625,498)
Gain on retained interest of deconsolidated affiliate     0   10,010,090
Reclassification to consolidated subsidiaries     15,892,491   0
Equity in income (loss) of unconsolidated affiliates $ 5,350,524 $ 2,386,339 370,446 $ (1,288,964) 2,697,420
End of period $ 102,488,703   $ 102,488,703   $ 118,218,389