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Note 8 - Investments, Including Investments Accounted for Using the Equity Method (Tables) | 12 Months Ended
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Dec. 31, 2022
Notes Tables |
Investment [Table Text Block] |
|  | December 31, |
|  | 2022 |  |  | 2021 |
Certificates of deposit |  | $ | - |  |  | $ | 310,276 |
U.S. Treasury securities held to maturity |  |  | 4,757,224 |  |  |  | 4,418,719 |
Common stock warrants of Sky Harbour Group Corporation |  |  | 1,531,604 |  |  |  | - |
Total |  | $ | 6,288,828 |  |  | $ | 4,728,995 |
|  | December 31, |
|  | 2022 |  |  | 2021 |
U.S. Treasury securities held to maturity |  | $ | 6,729,457 |  |  | $ | 154,265 |
Preferred stock |  |  | 348,694 |  |  |  | 104,019 |
Voting common stock of CB&T Holding Corporation |  |  | 19,058,485 |  |  |  | 19,058,485 |
Total |  | $ | 26,136,636 |  |  | $ | 19,316,769 |
Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] |
|  |  |  |  |  | Gross |  |  |  |  |
|  |  |  |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gain (Loss) |  |  | Value |
Marketable equity securities, December 31, 2022 |  | $ | 9,665,100 |  |  | $ | (896,162 | ) |  | $ | 8,768,938 |
Marketable equity securities, December 31, 2021 |  | $ | 20,893,647 |  |  | $ | 49,723,850 |  |  | $ | 70,617,497 |
Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] |
|  |  |  |  |  | Gross |  |  |  |  |
|  |  |  |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gain (Loss) |  |  | Value |
U.S. Treasury trading securities, December 31, 2022 |  | $ | 33,888,165 |  |  | $ | (367,764 | ) |  | $ | 33,520,401 |
U.S. Treasury trading securities, December 31, 2021 |  | $ | 87,541,764 |  |  | $ | 3,140 |  |  | $ | 87,544,904 |
Investments in and Advances to Affiliates [Table Text Block] |
|  | December 31, |
|  | 2022 |  |  | 2021 |
Beginning of year |  | $ | 61,660,905 |  |  | $ | 20,913,896 |
Additional investments in unconsolidated affiliates |  |  | 45,094,500 |  |  |  | 55,000,000 |
Distributions received |  |  | (642,511 | ) |  |  | (2,251,766 | )
Reclassification of marketable securities to investment in affiliate |  |  | 23,483 |  |  |  | - |
Reclassification of investment in affiliate to marketable securities |  |  | - |  |  |  | (12,880,146 | )
Transfer of interest |  |  | (625,498 | ) |  |  | - |
Gain on retained interest of deconsolidated affiliate |  |  | 10,010,090 |  |  |  | - |
Equity in (loss) income of unconsolidated affiliates |  |  | (1,387,620 | ) |  |  | 878,921 |
End of year |  | $ | 114,133,349 |  |  | $ | 61,660,905 |
Equity Method Investments [Table Text Block] |
|  | December 31, |
|  | 2022 |  |  | 2021 |
Revenue |  | $ | 24,672,878 |  |  | $ | 31,071,188 |
Gross profit |  |  | 12,148,774 |  |  |  | 9,562,278 |
Income from continuing operations |  |  | (18,539,589 | ) |  |  | (10,049,214 | )
Net income |  |  | (7,922,455 | ) |  |  | (11,382,572 | )

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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- Definition Tabular disclosure of investment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -URI https://asc.fasb.org/topic&trid=2197064 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -URI https://asc.fasb.org/topic&trid=75115024 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI https://asc.fasb.org/topic&trid=2196928 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -URI https://asc.fasb.org/topic&trid=2196965 + Details
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- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References No definition available. + Details
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