Loans - Summary of Balances of Loans (Detail) (USD $)	Jun. 30, 2013	Dec. 31, 2012		Jun. 30, 2012
Summary of balances of loans
Total loans	$ 234,850,693	$ 239,238,149		$ 241,490,579
Allowance for loan losses	(2,983,147)	(3,093,623)
Loans, net	231,867,546	236,144,526	[1]
Construction, Land and Land Development [Member]
Summary of balances of loans
Total loans	27,485,747	29,024,294		28,582,337
Farmland [Member]
Summary of balances of loans
Total loans	1,348,947	1,442,757		1,484,981
Commercial Mortgages (Non-Owner Occupied) [Member]
Summary of balances of loans
Total loans	13,536,438	13,420,551		20,884,287
Commercial Mortgages (Owner Occupied) [Member]
Summary of balances of loans
Total loans	34,168,786	33,634,384		26,063,505
Residential First Mortgages [Member]
Summary of balances of loans
Total loans	107,447,034	107,555,694		110,120,103
Residential Revolving and Junior Mortgages [Member]
Summary of balances of loans
Total loans	27,229,262	26,982,512		28,800,598
Commercial and Industrial Loans [Member]
Summary of balances of loans
Total loans	17,072,727	20,524,547		18,316,782
Consumer Loans [Member]
Summary of balances of loans
Total loans	$ 6,561,752	$ 6,653,410		$ 7,237,986

[1] Derived from the audited consolidated financial statements.