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Note 8 - Investments, Including Investments Accounted for Using the Equity Method (Tables) | 6 Months Ended
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Jun. 30, 2023
Notes Tables |
Investment [Table Text Block] |
|  | June 30, |  |  | December 31, |
|  | 2023 |  |  | 2022 |
U.S. Treasury notes held to maturity |  | $ | 7,624,876 |  |  | $ | 4,757,224 |
Notes receivable |  |  | 1,608,100 |  |  |  | - |
Common stock warrants of Sky Harbour Group Corporation |  |  | 2,393,131 |  |  |  | 1,531,604 |
Total |  | $ | 11,626,107 |  |  | $ | 6,288,828 |
Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] |
|  |  |  |  |  | Gross |  |  |  |  |
|  |  |  |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gain (Loss) |  |  | Value |
Marketable equity securities, June 30, 2023 |  | $ | 2,302,270 |  |  | $ | (263,111 | ) |  | $ | 2,039,159 |
Marketable equity securities, December 31, 2022 |  | $ | 9,665,100 |  |  | $ | (896,162 | ) |  | $ | 8,768,938 |
Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] |
|  |  |  |  |  | Gross |  |  |  |  |
|  |  |  |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gain (Loss) |  |  | Value |
U.S. Treasury trading securities, June 30, 2023 |  | $ | 69,498,769 |  |  | $ | (8,221 | ) |  | $ | 69,490,548 |
U.S. Treasury trading securities, December 31, 2022 |  | $ | 33,888,165 |  |  | $ | (367,764 | ) |  | $ | 33,520,401 |
|  | June 30, |  |  | December 31, |
|  | 2023 |  |  | 2022 |
U.S. Treasury securities held to maturity |  | $ | 4,751,068 |  |  | $ | 6,729,457 |
Investments in special purpose entities |  |  | 45,570,778 |  |  |  | - |
Preferred stock |  |  | 348,694 |  |  |  | 348,694 |
Voting common stock of CB&T Holding Corporation |  |  | 19,058,485 |  |  |  | 19,058,485 |
Total |  | $ | 69,729,025 |  |  | $ | 26,136,636 |
Investments in and Advances to Affiliates [Table Text Block] |
|  | June 30, |  |  | December 31, |
|  | 2023 |  |  | 2022 |
Beginning of year |  | $ | 118,218,389 |  |  | $ | 61,660,905 |
Additional investments in unconsolidated affiliates |  |  | - |  |  |  | 45,094,500 |
Distributions received |  |  | (207,641 | ) |  |  | (642,511 | )
Reclassification of marketable securities to investment in affiliate |  |  | - |  |  |  | 23,483 |
Transfer of interest |  |  | - |  |  |  | (625,498 | )
Gain on retained interest of deconsolidated affiliate |  |  | - |  |  |  | 10,010,090 |
Reclassification to consolidated subsidiaries |  |  | (15,892,491 | ) |  |  | - |
Equity in income (loss) of unconsolidated affiliates |  |  | 370,446 |  |  |  | 2,697,420 |
End of period |  | $ | 102,488,703 |  |  | $ | 118,218,389 |
Equity Method Investments [Table Text Block] |
|  | For the Three Months Ended |  |  | For the Six Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Revenue |  | $ | 3,397,876 |  |  | $ | 6,791,305 |  |  | $ | 7,046,638 |  |  | $ | 13,404,132 |
Gross profit |  |  | 2,626,275 |  |  |  | 2,923,405 |  |  |  | 5,643,331 |  |  |  | 6,184,727 |
Loss from continuing operations |  |  | (4,582,600 | ) |  |  | (4,951,614 | ) |  |  | (9,448,410 | ) |  |  | (10,085,907 | )
Net (loss) income |  |  | (1,461,670 | ) |  |  | 10,313,901 |  |  |  | (7,447,438 | ) |  |  | (8,381,383 | )

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- Definition Tabular disclosure of equity method investments including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481687/323-10-50-3 + Details
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- Definition Tabular disclosure of investment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//320/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Topic 321 -Publisher FASB -URI https://asc.fasb.org//321/tableOfContent Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Topic 325 -Publisher FASB -URI https://asc.fasb.org//325/tableOfContent + Details
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- Definition Tabular disclosure of investments in and advances to affiliates. Does not include the tabular disclosure of the disaggregation of investments in and advances to affiliates across legal entities. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 + Details
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