Note 9 - Allowance for Loan Losses and Credit Quality Information (Details) - Allowance for Loan Losses - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 8,402	$ 8,696	$ 8,332	$ 11,401
Provision for losses	(56)	(989)	(239)	(4,777)
Charge-offs	(59)	(70)	(91)	(1,159)
Recoveries	499	286	784	2,458
Ending balance	8,786	7,923	8,786	7,923
Allocated to:
Specific reserves					$ 911	$ 1,074
General reserves					7,875	7,258
Allowance	8,786	8,696	8,786	7,923	8,786	8,332
Loans receivable at December 31, 2014:
Individually reviewed for impairment					10,770	12,956
Collectively reviewed for impairment					430,257	360,600
Loans receivable					441,027	373,556
1-4 Family Porfolio Segment[Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	1,011	2,085	1,096	1,628
Provision for losses	117	(489)	30	60
Charge-offs	(19)	0	(19)	(92)
Recoveries	1	0	3	0
Ending balance	1,110	1,596	1,110	1,596
Allocated to:
Specific reserves					220	270
General reserves					890	826
Allowance	1,011	2,085	1,110	1,596	1,110	1,096
Loans receivable at December 31, 2014:
Individually reviewed for impairment					1,862	1,867
Collectively reviewed for impairment					80,365	67,974
Loans receivable					82,227	69,841
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	5,278	3,823	5,024	6,458
Provision for losses	(462)	14	(415)	(3,588)
Charge-offs	0	0	0	(936)
Recoveries	435	229	642	2,132
Ending balance	5,251	4,066	5,251	4,066
Allocated to:
Specific reserves					259	370
General reserves					4,992	4,654
Allowance	5,278	3,823	5,251	4,066	5,251	5,024
Loans receivable at December 31, 2014:
Individually reviewed for impairment					7,589	9,728
Collectively reviewed for impairment					228,530	181,940
Loans receivable					236,119	191,668
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	1,162	1,164	1,009	1,106
Provision for losses	25	(16)	191	83
Charge-offs	(39)	(15)	(66)	(75)
Recoveries	7	10	21	29
Ending balance	1,155	1,143	1,155	1,143
Allocated to:
Specific reserves					353	307
General reserves					802	702
Allowance	1,162	1,164	1,155	1,143	1,155	1,009
Loans receivable at December 31, 2014:
Individually reviewed for impairment					917	806
Collectively reviewed for impairment					61,938	54,119
Loans receivable					62,855	54,925
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	951	1,624	1,203	2,209
Provision for losses	264	(498)	(45)	(1,332)
Charge-offs	(1)	(55)	(6)	(56)
Recoveries	56	47	118	297
Ending balance	1,270	1,118	1,270	1,118
Allocated to:
Specific reserves					79	127
General reserves					1,191	1,076
Allowance	$ 951	$ 1,624	$ 1,270	$ 1,118	1,270	1,203
Loans receivable at December 31, 2014:
Individually reviewed for impairment					402	555
Collectively reviewed for impairment					59,424	56,567
Loans receivable					$ 59,826	$ 57,122