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Investment Securities (Details 2)
Sep. 30, 2019
USD ($)
Number
Dec. 31, 2018
USD ($)
Number
Less than 12 Months    
Number of positions | Number 20 4
Fair Value $ 10,025,105 $ 11,329,286
Gross Unrealized Losses $ (31,694) $ (21,849)
12 months or Longer    
Number of positions | Number 2 49
Fair value $ 5,424,628 $ 93,599,826
Gross Unrealized Losses $ (34,157) $ (2,340,749)
Total    
Number of positions | Number 22 53
Fair value $ 15,449,733 $ 104,929,112
Gross Unrealized Losses $ (65,851) $ (2,362,598)
U.S. Treasury Notes [Member]    
Less than 12 Months    
Number of positions | Number 1  
Fair Value $ 2,998,008  
Gross Unrealized Losses $ (1,992)  
12 months or Longer    
Number of positions | Number   7
Fair value   $ 32,356,634
Gross Unrealized Losses   $ (609,059)
Total    
Number of positions | Number 1 7
Fair value $ 2,998,008 $ 32,356,634
Gross Unrealized Losses $ (1,992) $ (609,059)
Government-Sponsored Enterprises [Member]    
Less than 12 Months    
Number of positions | Number   2
Fair Value   $ 9,967,000
Gross Unrealized Losses   $ (14,302)
12 months or Longer    
Number of positions | Number 1 11
Fair value $ 5,094,065 $ 49,402,280
Gross Unrealized Losses $ (30,720) $ (1,301,296)
Total    
Number of positions | Number 1 13
Fair value $ 5,094,065 $ 59,369,280
Gross Unrealized Losses $ (30,720) $ (1,315,598)
Municipal Securities [Member]    
Less than 12 Months    
Number of positions | Number 19 2
Fair Value $ 7,027,097 $ 1,362,286
Gross Unrealized Losses $ (29,702) $ (7,547)
12 months or Longer    
Number of positions | Number 1 31
Fair value $ 330,563 $ 11,840,912
Gross Unrealized Losses $ (3,437) $ (430,394)
Total    
Number of positions | Number 20 33
Fair value $ 7,357,660 $ 13,203,198
Gross Unrealized Losses $ (33,139) $ (437,941)