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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 9 Months Ended 12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Beginning of year     $ 118,218,389 $ 61,660,905 $ 61,660,905
Additional investments in unconsolidated affiliates     3,000,000   45,094,500
Distributions received     (271,355)   (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     15,813,482   0
Equity in income (loss) of unconsolidated affiliates $ (125,970) $ 436,157 244,476 $ (852,807) 2,697,420
End of period $ 105,378,028   $ 105,378,028   $ 118,218,389