Fair Value Disclosures - Carrying Amount and Estimated Fair Value of Financial Instruments (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Assets:
Cash and cash equivalents, Carrying Amount	$ 84,098,439	$ 68,748,308	$ 58,586,866	$ 79,964,633
Securities available for sale, Carrying Amount	115,535,000	129,422,000
Restricted investments, Carrying Amount	6,080,700	5,627,950
Loans, net, Carrying Amount	866,286,380	808,271,003
Cash and cash equivalents, Estimated Fair Value	84,098,000	68,748,000
Securities available for sale, Estimated Fair Value	115,535,000	129,422,000
Loans, net, Estimated Fair Value	855,882,000	803,057,000
Liabilities:
Noninterest-bearing demand deposits, Carrying Amount	185,385,953	153,482,650
Interest-bearing demand deposits, Carrying Amount	156,953,397	162,702,457
Money Market and Savings deposits, Carrying Amount	306,357,000	274,605,000
Time deposits, Carrying Amount	311,490,253	316,275,340
Securities sold under agreements to repurchase, Carrying Amount	26,541,772	26,621,984
Federal Home Loan Bank advances and other borrowings, Carrying Amount	6,000,000	18,505,390
Noninterest-bearing demand deposits, Estimated Fair Value	185,386,000	153,483,000
Interest-bearing demand deposits, Estimated Fair Value	156,953,000	162,702,000
Money Market and Savings deposits, Estimated Fair Value	306,357,000	274,605,000
Time deposits, Estimated Fair Value	311,755,000	316,734,000
Securities sold under agreements to repurchase, Estimated Fair Value	26,542,000	26,622,000
Federal Home Loan Bank advances and other borrowings, Estimated Fair Value	$ 6,000,000	$ 18,505,000