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Note 8 - Investments, Including Investments Accounted for Using the Equity Method - Summarized Financial Data (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Revenue | $ 45,743,463 | $ 41,389,138
Gross profit | 27,234,805 | 23,777,771
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total | 496,464 | (1,481,265)
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] |  |
Revenue | 1,147,735,494 | 19,374,109
Gross profit | 176,953,564 | 6,731,623
Income from continuing operations | 82,604,418 | 1,806,620
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total | $ 86,473,464 | $ 1,859,438

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