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Note 8 - Investments, Including Investments Accounted for Using the Equity Method (Tables)
9 Months Ended
Sep. 30, 2018
Notes Tables  
Investment [Table Text Block]
   
September 30,
   
December 31,
 
   
2018
   
2017
 
                 
Certificates of deposit
  $
868,338
    $
746,219
 
U.S. Treasury notes and corporate bond
   
4,177,513
     
809,184
 
Convertible note receivable
   
-
     
103,896
 
                 
Total
  $
5,045,851
    $
1,659,299
 
   
September 30,
   
December 31,
 
   
2018
   
2017
 
                 
U.S. Treasury securities, held to maturity
  $
2,214,050
    $
2,820,855
 
Certificates of deposit
   
898,491
     
1,080,426
 
Preferred stock
   
104,019
     
-
 
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
     
-
 
                 
Total
  $
32,275,045
    $
13,901,281
 
Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block]
   
 
 
 
 
Gross
   
 
 
 
   
 
 
 
 
Unrealized
   
Fair
 
   
Cost
   
Gain
   
Value
 
                         
U.S. Treasury bills, September 30, 2018
  $
-
    $
-
    $
-
 
                         
U.S. Treasury bills, December 31, 2017
  $
82,968,614
    $
132,191
    $
83,100,805
 
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]
   
 
 
 
 
Gross
   
 
 
 
   
 
 
 
 
Unrealized
   
Fair
 
   
Cost
   
Gain
   
Value
 
                         
U.S. Treasury notes, September 30, 2018
  $
98,540,985
    $
258,913
    $
98,799,898
 
Investments in and Advances to Affiliates [Table Text Block]
   
September 30,
   
December 31,
 
   
2018
   
2017
 
                 
Beginning of period
  $
952,128
    $
871,918
 
Additional investments in unconsolidated affiliates
   
40,399
     
66,000
 
Distributions received
   
(668,788
)    
(59,550
)
Loss on investment in affiliate
   
(105,664
)    
-
 
Equity in income of unconsolidated affiliates
   
502,486
     
73,760
 
                 
End of period
  $
720,561
    $
952,128