Loans and Allowance for Loan Losses - Schedule of Allowance for Loan Losses Methodology (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Beginning balance	$ 3,124,611	$ 3,032,242	$ 3,114,151
Charge-offs	447,747	116,006	319,200
Recoveries	66,768	48,375	95,991
Net charge-offs	380,979	67,631
Provisions charged to operations	300,000	160,000	141,300
Individually evaluated for impairment	331,779	549,429
Collectively evaluated for impairment	2,711,853	2,575,182
Balance at end of period	3,043,632	3,124,611	3,032,242
Individually evaluated for impairment	8,062,312	8,071,512
Collectively evaluated for impairment	322,128,999	284,471,619
Balance at end of period	330,191,311	292,543,131
Commercial, Financial And Agricultural [Member]
Beginning balance	191,267	144,781
Charge-offs	113,334	103,387
Recoveries	63,486	28,303
Net charge-offs	49,848	75,084
Provisions charged to operations	182,841	121,570
Individually evaluated for impairment	44,468	12,021
Collectively evaluated for impairment	279,792	179,246
Balance at end of period	324,260	191,267	144,781
Individually evaluated for impairment	459,003	102,086
Collectively evaluated for impairment	72,687,394	70,897,337
Balance at end of period	73,146,397	70,999,423
Construction Real Estate [Member]
Beginning balance	1,043,083	1,043,083
Charge-offs	0	0
Recoveries	0	0
Net charge-offs	0	0
Provisions charged to operations	0	0
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	1,043,083	1,043,083
Balance at end of period	1,043,083	1,043,083	1,043,083
Individually evaluated for impairment	428,799	126,215
Collectively evaluated for impairment	21,858,213	25,873,080
Balance at end of period	22,287,012	25,999,295
Commercial Real Estate [Member]
Beginning balance	1,192,098	1,192,098
Charge-offs	168,717	0
Recoveries	0	0
Net charge-offs	168,717	0
Provisions charged to operations	33,214	0
Individually evaluated for impairment	57,403	245,472
Collectively evaluated for impairment	999,192	946,626
Balance at end of period	1,056,595	1,192,098	1,192,098
Individually evaluated for impairment	4,561,198	4,496,700
Collectively evaluated for impairment	101,897,144	87,236,112
Balance at end of period	106,458,342	91,732,812
Residential Real Estate [Member]
Beginning balance	420,189	381,891
Charge-offs	59,764	3,394
Recoveries	0	16,994
Net charge-offs	59,764	(13,600)
Provisions charged to operations	56,049	24,698
Individually evaluated for impairment	224,916	291,936
Collectively evaluated for impairment	191,558	128,253
Balance at end of period	416,474	420,189	381,891
Individually evaluated for impairment	2,448,531	2,281,439
Collectively evaluated for impairment	96,711,076	80,989,544
Balance at end of period	99,159,607	83,270,983
Agricultural Real Estate [Member]
Beginning balance	86,656	86,656
Charge-offs	93,503	0
Recoveries	0	0
Net charge-offs	93,503	0
Provisions charged to operations	18,407	0
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	11,560	86,656
Balance at end of period	11,560	86,656	86,656
Individually evaluated for impairment	142,966	1,061,826
Collectively evaluated for impairment	25,230,655	15,518,300
Balance at end of period	25,373,621	16,580,126
Consumer and Other [Member]
Beginning balance	191,318	183,733
Charge-offs	12,429	9,225
Recoveries	3,282	3,078
Net charge-offs	9,147	6,147
Provisions charged to operations	9,489	13,732
Individually evaluated for impairment	4,992	0
Collectively evaluated for impairment	186,668	191,318
Balance at end of period	191,660	191,318	$ 183,733
Individually evaluated for impairment	21,815	3,246
Collectively evaluated for impairment	3,744,517	3,957,246
Balance at end of period	$ 3,766,332	$ 3,960,492