Allowance for Loan Losses - Allowance for Loan Losses by Portfolio Segment (Detail) (USD $)	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
ALLOWANCE FOR LOAN LOSSES:
Beginning Balance	$ 3,093,623	$ 3,188,541
(Charge-offs)	(436,797)	(838,255)
Recoveries	64,321	347,987
Provision	262,000	642,685
Ending Balance	2,983,147	3,340,958
Individually evaluated for impairment	831,679	1,804,490
Collectively evaluated for impairment	2,151,468	1,536,468
Ending Balance:
Individually evaluated for impairment	6,835,460	8,403,498
Collectively evaluated for impairment	228,015,233	233,087,081
Total Gross Loans	234,850,693	241,490,579	239,238,149
Construction, Land and Land Development [Member]
ALLOWANCE FOR LOAN LOSSES:
Beginning Balance	191,882	190,500
(Charge-offs)		(57,660)
Recoveries	16,852
Provision	19,015	41,031
Ending Balance	227,749	173,871
Individually evaluated for impairment	25,749	117,871
Collectively evaluated for impairment	202,000	56,000
Ending Balance:
Individually evaluated for impairment	213,070	406,378
Collectively evaluated for impairment	27,272,677	28,175,959
Total Gross Loans	27,485,747	28,582,337	29,024,294
Farmland [Member]
ALLOWANCE FOR LOAN LOSSES:
Beginning Balance			2,000
Provision		1,000
Ending Balance	2,000	1,000	2,000
Collectively evaluated for impairment	2,000	1,000
Ending Balance:
Collectively evaluated for impairment	1,348,947	1,484,981
Total Gross Loans	1,348,947	1,484,981	1,442,757
Commercial Mortgages (Non-Owner Occupied) [Member]
ALLOWANCE FOR LOAN LOSSES:
Beginning Balance	106,000	88,000
(Charge-offs)		(283,569)
Recoveries	18,889	285,084
Provision	(40,889)	(515)
Ending Balance	84,000	89,000
Collectively evaluated for impairment	84,000	89,000
Ending Balance:
Collectively evaluated for impairment	13,536,438	20,884,287
Total Gross Loans	13,536,438	20,884,287	13,420,551
Commercial Mortgages (Owner Occupied) [Member]
ALLOWANCE FOR LOAN LOSSES:
Beginning Balance	545,084	554,318
Provision	(116,276)	(179,522)
Ending Balance	428,808	374,796
Individually evaluated for impairment	114,808	140,796
Collectively evaluated for impairment	314,000	234,000
Ending Balance:
Individually evaluated for impairment	1,287,682	1,603,830
Collectively evaluated for impairment	32,881,104	24,459,675
Total Gross Loans	34,168,786	26,063,505	33,634,384
Residential First Mortgages [Member]
ALLOWANCE FOR LOAN LOSSES:
Beginning Balance	1,209,454	1,161,551
(Charge-offs)	(365,012)	(203,544)
Recoveries	24,360
Provision	180,687	277,334
Ending Balance	1,049,489	1,235,341
Individually evaluated for impairment	312,489	843,341
Collectively evaluated for impairment	737,000	392,000
Ending Balance:
Individually evaluated for impairment	3,811,380	4,025,871
Collectively evaluated for impairment	103,635,654	106,094,232
Total Gross Loans	107,447,034	110,120,103	107,555,694
Residential Revolving and Junior Mortgages [Member]
ALLOWANCE FOR LOAN LOSSES:
Beginning Balance	517,253	719,121
(Charge-offs)		(32,674)
Provision	152,170	(76,007)
Ending Balance	669,423	610,440
Individually evaluated for impairment	306,423	431,440
Collectively evaluated for impairment	363,000	179,000
Ending Balance:
Individually evaluated for impairment	1,451,118	1,760,201
Collectively evaluated for impairment	25,778,144	27,040,397
Total Gross Loans	27,229,262	28,800,598	26,982,512
Commercial and Industrial Loans [Member]
ALLOWANCE FOR LOAN LOSSES:
Beginning Balance	262,000	281,650
(Charge-offs)	(16,897)	(185,427)
Recoveries	35	10,869
Provision	4,862	180,740
Ending Balance	250,000	287,832
Individually evaluated for impairment		176,832
Collectively evaluated for impairment	250,000	111,000
Ending Balance:
Individually evaluated for impairment		513,008
Collectively evaluated for impairment	17,072,727	17,803,774
Total Gross Loans	17,072,727	18,316,782	20,524,547
Consumer Loans [Member]
ALLOWANCE FOR LOAN LOSSES:
Beginning Balance	252,210	185,000
(Charge-offs)	(54,888)	(75,381)
Recoveries	4,185	52,034
Provision	64,703	99,557
Ending Balance	266,210	261,210
Individually evaluated for impairment	72,210	94,210
Collectively evaluated for impairment	194,000	167,000
Ending Balance:
Individually evaluated for impairment	72,210	94,210
Collectively evaluated for impairment	6,489,542	7,143,776
Total Gross Loans	6,561,752	7,237,986	6,653,410
Unallocated [Member]
ALLOWANCE FOR LOAN LOSSES:
Beginning Balance	7,740	8,401
Provision	(2,272)	299,067
Ending Balance	5,468	307,468
Collectively evaluated for impairment	$ 5,468	$ 307,468