Consolidated Statements of Income - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Interest Income
Loans	$ 27,454,089	$ 23,314,776	$ 23,564,766
Investment securities	1,791,921	1,895,395	1,483,772
Other	194,723	179,155	141,096
	29,440,733	25,389,326	25,189,634
Interest Expense
Deposits	3,751,565	2,283,982	2,423,871
Federal Home Loan Bank advances	1,703,787	1,313,620	1,196,393
Subordinated debentures	631,202	579,410	538,785
Securities sold under agreements to repurchase			120,833
	6,086,554	4,177,012	4,279,882
Net Interest Income	23,354,179	21,212,314	20,909,752
Provision for Loan Losses	1,750,000	1,375,000	600,000
Net Interest Income After Provision for Loan Losses	21,604,179	19,837,314	20,309,752
Noninterest Income
Service charges	1,189,575	1,134,664	1,214,880
Gain on sale of investment securities	46,329	192,537	187,090
Gain on sale of mortgage loans held for sale	2,021,208	1,708,478	1,396,358
Gain on sale of Small Business Administration loans	746,639	297,462	344,818
Net gain (loss) on foreclosed assets	182,004	1,270	(164,663)
Other income	1,541,565	1,535,796	1,499,589
	5,727,320	4,870,207	4,478,072
Noninterest Expense
Salaries and employee benefits	12,040,528	10,686,564	9,805,337
Occupancy	2,204,408	1,827,209	1,904,886
FDIC deposit insurance premiums	245,115	350,475	447,044
Prepayment penalty on repurchase agreements			463,992
Data processing	987,193	889,575	790,928
Advertising	525,000	525,000	525,000
Impairment on investment tax credits	587,428
Merger costs	151,270
Other expense	2,862,144	2,821,923	2,672,541
	19,603,086	17,100,746	16,609,728
Income Before Income Taxes	7,728,413	7,606,775	8,178,096
Provision for Income Taxes	2,570,749	2,012,764	2,461,329
Net Income Available to Common Shareholders	$ 5,157,664	$ 5,594,011	$ 5,716,767
Basic Income Per Common Share (in dollars per share)	$ 1.18	$ 1.28	$ 1.32
Diluted Income Per Common Share (in dollars per share)	$ 1.16	$ 1.27	$ 1.30