Loans and Servicing (Details 2) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Allowance for loan losses
Beginning Balance	$ 1,780,000	$ 1,824,000	$ 1,824,000
Charge-offs	(132,000)		(386,000)
Recoveries	3,000		142,000
Provision (benefit)	90,000	64,000	200,000
Ending Balance	1,741,000		1,780,000
Ending balance: individually evaluated for impairment	240,000		320,000
Ending balance: collectively evaluated for impairment	1,501,000		1,460,000
Loans
Ending balance	184,021,000		181,809,000
Ending balance: individually evaluated for impairment	3,133,000		3,115,000
Ending balance: collectively evaluated for impairment	180,888,000		178,694,000
Residential loans:
Loans
Ending balance	109,502,000		111,106,000
One- to four- family, residential loans
Allowance for loan losses
Beginning Balance	378,000	346,000	346,000
Charge-offs	(130,000)		(144,000)
Recoveries			137,000
Provision (benefit)	49,000		39,000
Ending Balance	297,000		378,000
Ending balance: individually evaluated for impairment	14,000		93,000
Ending balance: collectively evaluated for impairment	283,000		285,000
Loans
Ending balance	94,689,000		95,546,000
Ending balance: individually evaluated for impairment	280,000		658,000
Ending balance: collectively evaluated for impairment	94,409,000		94,888,000
Home equity loans and lines of credit
Allowance for loan losses
Beginning Balance	254,000	341,000	341,000
Provision (benefit)	(12,000)		(87,000)
Ending Balance	242,000		254,000
Ending balance: individually evaluated for impairment	13,000		13,000
Ending balance: collectively evaluated for impairment	229,000		241,000
Loans
Ending balance	14,813,000		15,560,000
Ending balance: individually evaluated for impairment	443,000		45,000
Ending balance: collectively evaluated for impairment	14,370,000		15,515,000
Commercial loans:
Loans
Ending balance	60,043,000		58,084,000
One-to-four family investment property
Allowance for loan losses
Beginning Balance	62,000	59,000	59,000
Provision (benefit)	5,000		3,000
Ending Balance	67,000		62,000
Ending balance: collectively evaluated for impairment	67,000		62,000
Loans
Ending balance	12,164,000		11,355,000
Ending balance: collectively evaluated for impairment	12,164,000		11,355,000
Multi-family real estate
Allowance for loan losses
Beginning Balance	40,000	98,000	98,000
Provision (benefit)	1,000		(58,000)
Ending Balance	41,000		40,000
Ending balance: collectively evaluated for impairment	41,000		40,000
Loans
Ending balance	5,451,000		5,346,000
Ending balance: collectively evaluated for impairment	5,451,000		5,346,000
Commercial real estate
Allowance for loan losses
Beginning Balance	668,000	400,000	400,000
Provision (benefit)	20,000		268,000
Ending Balance	688,000		668,000
Ending balance: individually evaluated for impairment	213,000		214,000
Ending balance: collectively evaluated for impairment	475,000		454,000
Loans
Ending balance	34,067,000		32,730,000
Ending balance: individually evaluated for impairment	2,410,000		2,412,000
Ending balance: collectively evaluated for impairment	31,657,000		30,318,000
Commercial business
Allowance for loan losses
Beginning Balance	159,000	234,000	234,000
Charge-offs			(13,000)
Provision (benefit)	(6,000)		(62,000)
Ending Balance	153,000		159,000
Ending balance: collectively evaluated for impairment	153,000		159,000
Loans
Ending balance	8,361,000		8,653,000
Ending balance: collectively evaluated for impairment	8,361,000		8,653,000
Construction loans:
Loans
Ending balance	14,092,000		12,205,000
One-to-four family, construction loans
Allowance for loan losses
Beginning Balance	149,000	228,000	228,000
Charge-offs			(191,000)
Provision (benefit)	(20,000)		112,000
Ending Balance	129,000		149,000
Ending balance: collectively evaluated for impairment	129,000		149,000
Loans
Ending balance	6,545,000		7,379,000
Ending balance: collectively evaluated for impairment	6,545,000		7,379,000
Multi-family
Allowance for loan losses
Beginning Balance	34,000	98,000	98,000
Provision (benefit)	3,000		(64,000)
Ending Balance	37,000		34,000
Ending balance: collectively evaluated for impairment	37,000		34,000
Loans
Ending balance	3,975,000		3,665,000
Ending balance: collectively evaluated for impairment	3,975,000		3,665,000
Non-residential
Allowance for loan losses
Beginning Balance	25,000	11,000	11,000
Provision (benefit)	52,000		14,000
Ending Balance	77,000		25,000
Ending balance: collectively evaluated for impairment	77,000		25,000
Loans
Ending balance	3,572,000		1,161,000
Ending balance: collectively evaluated for impairment	3,572,000		1,161,000
Consumer
Allowance for loan losses
Beginning Balance	11,000	9,000	9,000
Charge-offs	(2,000)		(38,000)
Recoveries	3,000		5,000
Provision (benefit)	(2,000)		35,000
Ending Balance	10,000		11,000
Ending balance: collectively evaluated for impairment	10,000		11,000
Loans
Ending balance	384,000		414,000
Ending balance: collectively evaluated for impairment	$ 384,000		$ 414,000