Allowance for Loan Losses - Schedule of Impairment on Allowance for Loan Losses, by Class of Loans (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Allowance for Loan Losses:
Allowance for loan losses, Beginning balance	$ 2,185,000	$ 2,514,000	$ 2,181,451	$ 2,504,000
Charge-offs	(2,000)	(2,000)	(7,000)	(10,000)
Recoveries	86,000	1,000	94,190	19,016
Provision
Allowance for loan losses, Ending balance	2,268,691	2,513,000	2,268,691	2,513,000
Loans individually evaluated for impairment	209,000	819,000	209,000	819,000
Loans collectively evaluated for impairment	2,060,000	1,694,000	2,060,000	1,694,000
Commercial and Other Loans [Member]
Allowance for Loan Losses:
Allowance for loan losses, Beginning balance	179,000	170,000	179,000	179,000
Charge-offs
Recoveries
Provision	120,000	(1,000)	120,000	(10,000)
Allowance for loan losses, Ending balance	299,000	169,000	299,000	169,000
Loans individually evaluated for impairment	23,000	24,000	23,000	24,000
Loans collectively evaluated for impairment	276,000	145,000	276,000	145,000
Commercial Real Estate [Member]
Allowance for Loan Losses:
Allowance for loan losses, Beginning balance	1,762,000	2,050,000	1,762,000	2,082,000
Charge-offs				(3,000)
Recoveries	84,000		84,000	15,000
Provision	(312,000)	(10,000)	(312,000)	(54,000)
Allowance for loan losses, Ending balance	1,534,000	2,040,000	1,534,000	2,040,000
Loans individually evaluated for impairment	186,000	795,000	186,000	795,000
Loans collectively evaluated for impairment	1,348,000	1,245,000	1,348,000	1,245,000
Consumer Real Estate [Member]
Allowance for Loan Losses:
Allowance for loan losses, Beginning balance	193,000	254,000	193,000	193,000
Charge-offs
Recoveries
Provision	208,000	13,000	208,000	74,000
Allowance for loan losses, Ending balance	401,000	267,000	401,000	267,000
Loans individually evaluated for impairment
Loans collectively evaluated for impairment	401,000	267,000	401,000	267,000
Consumer Loans [Member]
Allowance for Loan Losses:
Allowance for loan losses, Beginning balance	51,000	40,000	47,000	50,000
Charge-offs	(2,000)	(2,000)	(7,000)	(7,000)
Recoveries	2,000	1,000	11,000	4,000
Provision	(16,000)	(2,000)	(16,000)	(10,000)
Allowance for loan losses, Ending balance	35,000	37,000	35,000	37,000
Loans individually evaluated for impairment
Loans collectively evaluated for impairment	$ 35,000	$ 37,000	$ 35,000	$ 37,000