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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, 2019
Notes Tables |
Investment [Table Text Block] |
|  | June 30, |  |  | December 31, |
|  | 2019 |  |  | 2018 |
Certificates of deposit |  | $ | 563,315 |  |  | $ | 1,378,666 |
U.S. Treasury notes and corporate bond |  |  | 4,548,968 |  |  |  | 4,872,398 |
Total |  | $ | 5,112,283 |  |  | $ | 6,251,064 |
|  | June 30, |  |  | December 31, |
|  | 2019 |  |  | 2018 |
U.S. Treasury securities, held to maturity |  | $ | 2,504,769 |  |  | $ | 2,902,004 |
Certificates of deposit |  |  | - |  |  |  | 317,178 |
Preferred stock |  |  | 104,019 |  |  |  | 104,019 |
Non-voting preferred units of Dream Finders Holdings, LLC |  |  | 12,000,000 |  |  |  | - |
Non-voting common units of Dream Finders Holdings, LLC |  |  | 10,000,000 |  |  |  | 10,000,000 |
Voting common stock of CB&T Holding Corporation |  |  | 19,058,485 |  |  |  | 19,058,485 |
Total |  | $ | 43,667,273 |  |  | $ | 32,381,686 |
Marketable Securities [Table Text Block] |
|  | Cost |  |  | Gross Unrealized Gain |  |  | Fair Value |
Marketable equity securities, June 30, 2019 |  | $ | 11,934,888 |  |  | $ | 87,473 |  |  | $ | 12,022,361 |
Schedule of Available-for-sale Securities Reconciliation [Table Text Block] |
|  |  |  |  |  | Gross |  |  |  |  |
|  |  |  |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gain (Loss) |  |  | Value |
U.S. Treasury notes, June 30, 2019 |  | $ | 85,056,102 |  |  | $ | (36,957 | ) |  | $ | 85,019,145 |
U.S. Treasury notes, December 31, 2018 |  | $ | 86,728,590 |  |  | $ | 116,796 |  |  | $ | 86,845,386 |
Investments in and Advances to Affiliates [Table Text Block] |
|  | June 30, |  |  | December 31, |
|  | 2019 |  |  | 2018 |
Beginning of period |  | $ | 568,713 |  |  | $ | 952,128 |
Additional investment in unconsolidated affiliate |  |  | - |  |  |  | 40,399 |
Distributions received |  |  | (203,382 | ) |  |  | (816,201 | )
Loss on investment in affiliate |  |  | - |  |  |  | (107,630 | )
Equity in income of unconsolidated affiliates |  |  | 163,769 |  |  |  | 500,017 |
End of period |  | $ | 529,100 |  |  | $ | 568,713 |

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