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Loans and Allowance for Loan Losses - Schedule of Loan Portfolio and Percentage of Loans in Each Category to Total Loans (Details) - USD ($)
Sep. 30, 2018
Dec. 31, 2017
Loans outstanding $ 366,662,213 $ 330,191,311
Unearned interest and discount (17,490) (17,921)
Allowance for loan losses (3,078,098) (3,043,632)
Net loans $ 363,566,625 $ 327,129,758
Percentage of loan and allowance for loan losses 100.00% 100.00%
Commercial, Financial and Agricultural Loans [Member]    
Loans outstanding $ 87,717,667 $ 73,146,397
Percentage of loan and allowance for loan losses 23.90% 22.20%
Construction Loans [Member]    
Loans outstanding $ 30,799,672 $ 22,287,012
Percentage of loan and allowance for loan losses 8.40% 6.80%
Commercial Mortgage Loans [Member]    
Loans outstanding $ 105,935,188 $ 106,458,342
Percentage of loan and allowance for loan losses 28.90% 32.20%
Residential Loans [Member]    
Loans outstanding $ 104,797,473 $ 99,159,607
Percentage of loan and allowance for loan losses 28.60% 30.00%
Agricultural Loans [Member]    
Loans outstanding $ 32,234,234 $ 25,373,621
Percentage of loan and allowance for loan losses 8.80% 7.70%
Consumer and Other Loans [Member]    
Loans outstanding $ 5,177,979 $ 3,766,332
Percentage of loan and allowance for loan losses 1.40% 1.10%