Note 4 - Loans and Allowance for Loan Losses (Details) - Allowance for Loan Losses - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	$ 6,756,000	$ 7,761,000	$ 6,588,597	$ 7,802,000
Balance, end of period	6,651,308	6,788,000	6,651,308	6,788,000
Ending balance: individually evaluated for impairment	709,000		709,000		$ 785,000
Ending balance: collectively evaluated for impairment	5,942,000		5,942,000		5,804,000
Loans:
Loans ending balance: individually evaluated for impairment	6,647,000		6,647,000		6,028,000
Loans ending balance: collectively evaluated for impairment	504,944,000		504,944,000		487,409,000
Provision charged to expense		325,000	150,000	525,000
Losses charged off	(114,000)	(1,337,000)	(132,000)	(1,606,000)
Recoveries	9,000	39,000	44,000	67,000
Residential Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	1,361,000	2,008,000	1,330,000	2,387,000
Balance, end of period	1,346,000	1,879,000	1,346,000	1,879,000
Ending balance: individually evaluated for impairment	375,000		375,000		376,000
Ending balance: collectively evaluated for impairment	971,000		971,000		954,000
Loans:
Loans ending balance: individually evaluated for impairment	2,684,000		2,684,000		2,893,000
Loans ending balance: collectively evaluated for impairment	32,684,000		32,684,000		33,892,000
Provision charged to expense	(16,000)	76,000	8,000	(304,000)
Losses charged off	0	(207,000)		(207,000)
Recoveries	1,000	2,000	8,000	3,000
Residential Portfolio Segment [Member] | One-to-four Family Units [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	884,000	962,000	900,000	997,000
Balance, end of period	805,000	1,014,000	805,000	1,014,000
Ending balance: individually evaluated for impairment					36,000
Ending balance: collectively evaluated for impairment	805,000		805,000		864,000
Loans:
Loans ending balance: individually evaluated for impairment	745,000		745,000		847,000
Loans ending balance: collectively evaluated for impairment	95,158,000		95,158,000		97,054,000
Provision charged to expense	18,000	65,000	(6,000)	114,000
Losses charged off	(99,000)	(14,000)	(99,000)	(100,000)
Recoveries	2,000	1,000	10,000	3,000
Residential Portfolio Segment [Member] | Multi-family Units [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	133,000	147,000	127,000	209,000
Balance, end of period	151,000	146,000	151,000	146,000
Ending balance: individually evaluated for impairment	0		0		0
Ending balance: collectively evaluated for impairment	151,000		151,000		127,000
Loans:
Loans ending balance: individually evaluated for impairment	0		0		0
Loans ending balance: collectively evaluated for impairment	39,993,000		39,993,000		33,786,000
Provision charged to expense	18,000	(1,000)	24,000	(63,000)
Losses charged off	0
Recoveries	0	0
Commercial Real Estate Portfolio Segment [Member] | Real Estate Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	1,986,000	2,344,000	1,992,000	2,059,000
Balance, end of period	1,945,000	2,284,000	1,945,000	2,284,000
Ending balance: individually evaluated for impairment	0		0		158,000
Ending balance: collectively evaluated for impairment	1,945,000		1,945,000		1,834,000
Loans:
Loans ending balance: individually evaluated for impairment	0		0		460,000
Loans ending balance: collectively evaluated for impairment	228,796,000		228,796,000		215,145,000
Provision charged to expense	(41,000)	(51,000)	(47,000)	234,000
Losses charged off	0	(9,000)		(9,000)
Recoveries	0	0
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	1,804,000	1,799,000	1,954,000	1,519,000
Balance, end of period	1,893,000	1,244,000	1,893,000	1,244,000
Ending balance: individually evaluated for impairment	313,000		313,000		203,000
Ending balance: collectively evaluated for impairment	1,580,000		1,580,000		1,751,000
Loans:
Loans ending balance: individually evaluated for impairment	939,000		939,000		1,027,000
Loans ending balance: collectively evaluated for impairment	88,769,000		88,769,000		91,087,000
Provision charged to expense	87,000	477,000	(64,000)	914,000
Losses charged off	0	(1,058,000)		(1,222,000)
Recoveries	2,000	26,000	3,000	33,000
Consumer Portfolio Segment [Member] | Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	221,000	228,000	185,000	272,000
Balance, end of period	232,000	221,000	232,000	221,000
Ending balance: individually evaluated for impairment	21,000		21,000		12,000
Ending balance: collectively evaluated for impairment	211,000		211,000		173,000
Loans:
Loans ending balance: individually evaluated for impairment	2,279,000		2,279,000		801,000
Loans ending balance: collectively evaluated for impairment	19,544,000		19,544,000		16,445,000
Provision charged to expense	22,000	32,000	57,000	(11,000)
Losses charged off	(15,000)	(49,000)	(33,000)	(68,000)
Recoveries	4,000	10,000	23,000	28,000
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	367,000	273,000	101,000	359,000
Balance, end of period	279,000		279,000
Ending balance: individually evaluated for impairment	0		0		0
Ending balance: collectively evaluated for impairment	279,000		279,000		101,000
Loans:
Loans ending balance: individually evaluated for impairment	0		0		0
Loans ending balance: collectively evaluated for impairment	0		0		$ 0
Provision charged to expense	(88,000)	(273,000)	$ 178,000	$ (359,000)
Losses charged off	0
Recoveries	$ 0	$ 0