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Investment Securities (Details 2)
Jun. 30, 2019
USD ($)
Number
Dec. 31, 2018
USD ($)
Number
Less than 12 Months    
Number of positions | Number 1 4
Fair Value $ 5,048,240 $ 11,329,286
Gross Unrealized Losses $ (702) $ (21,849)
12 months or Longer    
Number of positions | Number 30 49
Fair value $ 27,689,746 $ 93,599,826
Gross Unrealized Losses $ (195,266) $ (2,340,749)
Total    
Number of positions | Number 31 53
Fair value $ 32,737,986 $ 104,929,112
Gross Unrealized Losses $ (195,968) $ (2,362,598)
U.S. Treasury Notes [Member]    
Less than 12 Months    
Number of positions | Number 1  
Fair Value $ 5,048,240  
Gross Unrealized Losses $ (702)  
12 months or Longer    
Number of positions | Number 2 7
Fair value $ 8,025,118 $ 32,356,634
Gross Unrealized Losses $ (8,728) $ (609,059)
Total    
Number of positions | Number 3 7
Fair value $ 13,073,358 $ 32,356,634
Gross Unrealized Losses $ (9,430) $ (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 3 11
Fair value $ 10,397,565 $ 49,402,280
Gross Unrealized Losses $ (114,198) $ (1,301,296)
Total    
Number of positions | Number 3 13
Fair value $ 10,397,565 $ 59,369,280
Gross Unrealized Losses $ (114,198) $ (1,315,598)
Municipal Securities [Member]    
Less than 12 Months    
Number of positions | Number   2
Fair Value   $ 1,362,286
Gross Unrealized Losses   $ (7,547)
12 months or Longer    
Number of positions | Number 25 31
Fair value $ 9,267,063 $ 11,840,912
Gross Unrealized Losses $ (72,340) $ (430,394)
Total    
Number of positions | Number 25 33
Fair value $ 9,267,063 $ 13,203,198
Gross Unrealized Losses $ (72,340) $ (437,941)