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Note 8 - Investments, Including Investments Accounted for Using the Equity Method (Tables) | 3 Months Ended
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Mar. 31, 2021
Notes Tables |
Investment [Table Text Block] |
|  | March 31, |  |  | December 31, |
|  | 2021 |  |  | 2020 |
Certificates of deposit |  | $ | 417,625 |  |  | $ | 1,035,827 |
Corporate bonds available for sale |  |  | - |  |  |  | 1,020,000 |
U.S. Treasury notes and corporate bond |  |  | 4,942,094 |  |  |  | 4,994,848 |
Total |  | $ | 5,359,719 |  |  | $ | 7,050,675 |
|  | March 31, |  |  | December 31, |
|  | 2021 |  |  | 2020 |
U.S. Treasury securities, held to maturity |  | $ | 283,126 |  |  | $ | 286,015 |
Preferred stock |  |  | 104,019 |  |  |  | 104,019 |
Voting common stock of CBT Holding Corporation |  |  | 19,058,485 |  |  |  | 19,058,485 |
Total |  | $ | 19,445,630 |  |  | $ | 19,448,519 |
Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] |
|  |  |  |  |  | Gross |  |  |  |  |
|  |  |  |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gain (Loss) |  |  | Value |
Marketable equity securities, March 31, 2021 |  | $ | 43,684,885 |  |  | $ | 100,305,854 |  |  | $ | 143,990,739 |
Marketable equity securities, December 31, 2020 |  | $ | 68,205,548 |  |  | $ | (4,169,066 | ) |  | $ | 64,036,482 |
Schedule of Available-for-sale Securities Reconciliation [Table Text Block] |
|  |  |  |  |  | Gross |  |  |  |  |
|  |  |  |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gain (Loss) |  |  | Value |
U.S. Treasury securities, March 31, 2021 |  | $ | 54,494,536 |  |  | $ | 4,724 |  |  | $ | 54,499,260 |
U.S. Treasury securities, December 31, 2020 |  | $ | 37,766,133 |  |  | $ | 1,812 |  |  | $ | 37,767,945 |
Investments in and Advances to Affiliates [Table Text Block] |
|  | March 31, |  |  | December 31, |
|  | 2021 |  |  | 2020 |
Beginning of period |  | $ | 20,913,896 |  |  | $ | 771,805 |
Additional investment in unconsolidated affiliates |  |  | - |  |  |  | 16,000,000 |
Distributions received |  |  | (1,598,623 | ) |  |  | (1,433,480 | )
Reclassificaton of investment in affiliate to marketable securities |  |  | (12,880,147 | ) |  |  | - |
Equity in income of unconsolidated affiliates |  |  | 140,297 |  |  |  | 5,575,571 |
End of period |  | $ | 6,575,423 |  |  | $ | 20,913,896 |
Equity Method Investments [Table Text Block] |
|  | March 31, |
|  | 2021 |  |  | 2020 |
Revenue |  | $ | 9,416,765 |  |  | $ | 191,751,459 |
Gross profit |  |  | 6,637,948 |  |  |  | 25,787,988 |
Income from continuing operations |  |  | 20,713 |  |  |  | 7,382,036 |
Net (loss) income |  | $ | (453,471 | ) |  | $ | 6,517,748 |

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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 http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + 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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