Allowance for Loan Losses - Schedule of Loans Which are Individually Evaluated for Impairment, by Class of Loans (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Schedule Of Financial Receivables [Line Items]
Loans individually evaluated	$ 1,206,000	$ 3,372,000
Loans collectively evaluated	94,240,000	96,125,000
Net loans	95,445,438	99,387,344
Commercial and Other Loans [Member]
Schedule Of Financial Receivables [Line Items]
Loans individually evaluated	27,000	31,000
Loans collectively evaluated	17,123,000	15,572,000
Net loans	17,150,000	15,603,000
Commercial Real Estate [Member]
Schedule Of Financial Receivables [Line Items]
Loans individually evaluated	965,000	3,115,000
Loans collectively evaluated	43,751,000	47,035,000
Net loans	44,716,000	50,150,000
Consumer Real Estate [Member]
Schedule Of Financial Receivables [Line Items]
Loans individually evaluated	214,000	226,000
Loans collectively evaluated	29,659,000	28,409,000
Net loans	29,873,000	28,635,000
Consumer Loans [Member]
Schedule Of Financial Receivables [Line Items]
Loans individually evaluated
Loans collectively evaluated	3,826,000	5,231,000
Net loans	3,826,000	5,231,000
Unearned Discounts [Member]
Schedule Of Financial Receivables [Line Items]
Loans individually evaluated
Loans collectively evaluated	(119,000)	(122,000)
Net loans	$ (119,000)	$ (122,000)