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Note 8 - Investments, Including Investments Accounted for Using the Equity Method (Tables)
9 Months Ended
Sep. 30, 2019
Notes Tables  
Investment [Table Text Block]
   
September 30,
   
December 31,
 
   
2019
   
2018
 
                 
Certificates of deposit
  $
1,158,928
    $
1,378,666
 
U.S. Treasury notes and corporate bond
   
5,212,991
     
4,872,398
 
                 
Total
  $
6,371,919
    $
6,251,064
 
   
September 30,
   
December 31,
 
   
2019
   
2018
 
                 
U.S. Treasury securities, held to maturity
  $
1,474,937
    $
2,902,004
 
Certificates of deposit
   
687,779
     
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
  $
43,325,220
    $
32,381,686
 
Marketable Securities [Table Text Block]
     
 
 
 
Gross
     
 
 
     
 
 
 
Unrealized
   
Fair
 
   
Cost
   
Gain (Loss)
   
Value
 
                         
Marketable equity securities, September 30, 2019
  $
49,941,567
    $
2,925,116
    $
52,866,683
 
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]
     
 
 
 
Gross
     
 
 
     
 
 
 
Unrealized
   
Fair
 
   
Cost
   
Gain (Loss)
   
Value
 
                         
U.S. Treasury notes, September 30, 2019
  $
75,156,283
    $
(61,056
)   $
75,095,227
 
                         
U.S. Treasury notes, December 31, 2018
  $
86,728,590
    $
116,796
    $
86,845,386
 
Investments in and Advances to Affiliates [Table Text Block]
   
September 30,
   
December 31,
 
   
2019
   
2018
 
                 
Beginning of period
  $
568,713
    $
952,128
 
Additional investment in unconsolidated affiliate
   
225,978
     
40,399
 
Distributions received
   
(503,431
)    
(816,201
)
Loss on investment in affiliate
   
-
     
(107,630
)
Equity in income of unconsolidated affiliates
   
323,333
     
500,017
 
                 
End of period
  $
614,593
    $
568,713