Loans and Allowance for Loan Losses - Schedule of Allowance for Loan Losses Methodology (Details) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2016
Beginning balance	$ 3,095,987	$ 3,124,611	$ 3,032,242
Charge-offs	0	181,646	116,006
Recoveries	36,563	39,585	48,375
Net charge-offs	(36,563)	142,061	67,631
Provisions charged to operations	75,000	225,000	160,000
Individually evaluated for impairment	472,063	472,063	549,429
Collectively evaluated for impairment	2,735,487	2,735,487	2,575,182
Balance at end of period	3,207,550	3,207,550	3,124,611
Individually evaluated for impairment	7,928,751	7,928,751	8,071,512
Collectively evaluated for impairment	321,909,055	321,909,055	284,471,619
Balance at end of period	329,837,806	329,837,806	292,543,131
Commercial, Financial And Agricultural [Member]
Beginning balance	209,320	191,267	144,781
Charge-offs	0	113,334	103,387
Recoveries	35,375	37,013	28,303
Net charge-offs	(35,375)	76,321	75,084
Provisions charged to operations	43,278	173,027	121,570
Individually evaluated for impairment	12,012	12,012	12,021
Collectively evaluated for impairment	275,961	275,961	179,246
Balance at end of period	287,973	287,973	191,267
Individually evaluated for impairment	310,921	310,921	102,086
Collectively evaluated for impairment	75,061,637	75,061,637	70,897,337
Balance at end of period	75,372,558	75,372,558	70,999,423
Construction Real Estate [Member]
Beginning balance	1,043,083	1,043,083	1,043,083
Charge-offs	0	0	0
Recoveries	0	0	0
Net charge-offs	0	0	0
Provisions charged to operations	0	0	0
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	1,043,083	1,043,083	1,043,083
Balance at end of period	1,043,083	1,043,083	1,043,083
Individually evaluated for impairment	320,156	320,156	126,215
Collectively evaluated for impairment	25,392,256	25,392,256	25,873,080
Balance at end of period	25,712,412	25,712,412	25,999,295
Commercial Real Estate [Member]
Beginning balance	1,192,098	1,192,098	1,192,098
Charge-offs	0	0	0
Recoveries	0	0	0
Net charge-offs	0	0	0
Provisions charged to operations	0	0	0
Individually evaluated for impairment	225,302	225,302	245,472
Collectively evaluated for impairment	966,796	966,796	946,626
Balance at end of period	1,192,098	1,192,098	1,192,098
Individually evaluated for impairment	4,745,205	4,745,205	4,496,700
Collectively evaluated for impairment	98,629,576	98,629,576	87,236,112
Balance at end of period	103,374,781	103,374,781	91,732,812
Residential Real Estate [Member]
Beginning balance	375,958	420,189	381,891
Charge-offs	0	59,764	3,394
Recoveries	0	0	16,994
Net charge-offs	0	59,764	(13,600)
Provisions charged to operations	28,751	44,284	24,698
Individually evaluated for impairment	229,055	229,055	291,936
Collectively evaluated for impairment	175,654	175,654	128,253
Balance at end of period	404,709	404,709	420,189
Individually evaluated for impairment	2,378,335	2,378,335	2,281,439
Collectively evaluated for impairment	93,445,067	93,445,067	80,989,544
Balance at end of period	95,823,402	95,823,402	83,270,983
Agricultural Real Estate [Member]
Beginning balance	86,656	86,656	86,656
Charge-offs	0	0	0
Recoveries	0	0	0
Net charge-offs	0	0	0
Provisions charged to operations	0	0	0
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	86,656	86,656	86,656
Balance at end of period	86,656	86,656	86,656
Individually evaluated for impairment	146,907	146,907	1,061,826
Collectively evaluated for impairment	25,380,744	25,380,744	15,518,300
Balance at end of period	25,527,651	25,527,651	16,580,126
Consumer and Other [Member]
Beginning balance	188,872	191,318	183,733
Charge-offs	0	8,548	9,225
Recoveries	1,188	2,572	3,078
Net charge-offs	(1,188)	5,976	6,147
Provisions charged to operations	2,971	7,689	13,732
Individually evaluated for impairment	5,694	5,694	0
Collectively evaluated for impairment	187,337	187,337	191,318
Balance at end of period	193,031	193,031	191,318
Individually evaluated for impairment	27,227	27,227	3,246
Collectively evaluated for impairment	3,999,775	3,999,775	3,957,246
Balance at end of period	$ 4,027,002	$ 4,027,002	$ 3,960,492