Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Impaired Loans and Related Allowances (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Loans with no related allowance recorded, related allowance	$ 2,354		$ 2,354		$ 3,778
Loans with an allowance recorded:
Loans, related allowance	2,354		2,354		3,778
Loans, recorded investment	14,453		14,453		21,276
Loans, unpaid principal balance	18,074		18,074		32,433
Loans, average recorded investment	15,300	33,728	17,290	34,850
Loans, interest income recognized	51	72	94	151
WIth No Related Allowance Recorded [Member] | 1-4 Family [Member]
Financing Receivable, Impaired [Line Items]
Loans with no related allowance recorded, recorded investment	165		165		88
Loans with no related allowance recorded, unpaid principal balance	165		165		88
Loans with no related allowance recorded, related allowance	0		0		0
Loans with no related allowance recorded, average recorded investment	508	1,617	368	1,617
Loans with no related allowance recorded, interest income recognized	0	15	1	31
Loans with an allowance recorded:
Loans, related allowance	0		0		0
WIth No Related Allowance Recorded [Member] | Residential Developments [Member]
Financing Receivable, Impaired [Line Items]
Loans with no related allowance recorded, recorded investment	7,795		7,795		8,257
Loans with no related allowance recorded, unpaid principal balance	10,448		10,448		13,636
Loans with no related allowance recorded, related allowance	0		0		0
Loans with no related allowance recorded, average recorded investment	7,454	8,942	7,722	9,533
Loans with no related allowance recorded, interest income recognized	26	14	34	29
Loans with an allowance recorded:
Loans, related allowance	0		0		0
WIth No Related Allowance Recorded [Member] | Commercial Real Estate Other [Member]
Financing Receivable, Impaired [Line Items]
Loans with no related allowance recorded, recorded investment	51		51		52
Loans with no related allowance recorded, unpaid principal balance	236		236		52
Loans with no related allowance recorded, related allowance	0		0		0
Loans with no related allowance recorded, average recorded investment	51	361	51	454
Loans with no related allowance recorded, interest income recognized	0	4	0	7
Loans with an allowance recorded:
Loans, related allowance	0		0		0
WIth No Related Allowance Recorded [Member] | Consumer [Member]
Financing Receivable, Impaired [Line Items]
Loans with no related allowance recorded, recorded investment	443		443		487
Loans with no related allowance recorded, unpaid principal balance	447		447		491
Loans with no related allowance recorded, related allowance	0		0		0
Loans with no related allowance recorded, average recorded investment	457	291	467	325
Loans with no related allowance recorded, interest income recognized	1	2	2	5
Loans with an allowance recorded:
Loans, related allowance	0		0		0
WIth No Related Allowance Recorded [Member] | Construction Industry [Member]
Financing Receivable, Impaired [Line Items]
Loans with no related allowance recorded, recorded investment	87		87		93
Loans with no related allowance recorded, unpaid principal balance	247		247		296
Loans with no related allowance recorded, related allowance	0		0		0
Loans with no related allowance recorded, average recorded investment	89	82	90	88
Loans with no related allowance recorded, interest income recognized	0	0	0	0
Loans with an allowance recorded:
Loans, related allowance	0		0		0
WIth No Related Allowance Recorded [Member] | Commercial Business Other [Member]
Financing Receivable, Impaired [Line Items]
Loans with no related allowance recorded, recorded investment	0		0		0
Loans with no related allowance recorded, unpaid principal balance	0		0		0
Loans with no related allowance recorded, related allowance	0		0		0
Loans with no related allowance recorded, average recorded investment	0	2	0	12
Loans with no related allowance recorded, interest income recognized	0	0	0	0
Loans with an allowance recorded:
Loans, related allowance	0		0		0
1-4 Family [Member]
Financing Receivable, Impaired [Line Items]
Loans with no related allowance recorded, related allowance	761		761		404
Loans with an allowance recorded:
Loans with an allowance recorded, recorded investment	2,173		2,173		1,800
Loans with an allowance recorded, unpaid principal balance	2,217		2,217		1,844
Loans, related allowance	761		761		404
Loans with an allowance recorded, average recorded investment	1,883	2,687	1,855	2,815
Loans with an allowance recorded, interest income recognized	6	8	17	16
Loans, recorded investment	2,338		2,338		1,888
Loans, unpaid principal balance	2,382		2,382		1,932
Loans, average recorded investment	2,391	4,304	2,223	4,432
Loans, interest income recognized	6	23	18	47
Residential Developments [Member]
Financing Receivable, Impaired [Line Items]
Loans with no related allowance recorded, related allowance	229		229		2,260
Loans with an allowance recorded:
Loans with an allowance recorded, recorded investment	1,089		1,089		7,994
Loans with an allowance recorded, unpaid principal balance	1,096		1,096		12,725
Loans, related allowance	229		229		2,260
Loans with an allowance recorded, average recorded investment	2,437	13,953	4,289	13,989
Loans with an allowance recorded, interest income recognized	0	14	0	27
Loans, recorded investment	8,884		8,884		16,251
Loans, unpaid principal balance	11,544		11,544		26,361
Loans, average recorded investment	9,891	22,895	12,011	23,522
Loans, interest income recognized	26	28	34	56
Commercial Real Estate Other [Member]
Financing Receivable, Impaired [Line Items]
Loans with no related allowance recorded, related allowance	158		158		143
Loans with an allowance recorded:
Loans with an allowance recorded, recorded investment	869		869		888
Loans with an allowance recorded, unpaid principal balance	869		869		888
Loans, related allowance	158		158		143
Loans with an allowance recorded, average recorded investment	872	2,422	877	2,541
Loans with an allowance recorded, interest income recognized	8	1	16	4
Loans, recorded investment	920		920		940
Loans, unpaid principal balance	1,105		1,105		940
Loans, average recorded investment	923	2,783	928	2,995
Loans, interest income recognized	8	5	16	11
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Loans with no related allowance recorded, related allowance	449		449		382
Loans with an allowance recorded:
Loans with an allowance recorded, recorded investment	504		504		429
Loans with an allowance recorded, unpaid principal balance	520		520		429
Loans, related allowance	449		449		382
Loans with an allowance recorded, average recorded investment	506	1,498	480	1,475
Loans with an allowance recorded, interest income recognized	3	3	7	13
Loans, recorded investment	947		947		916
Loans, unpaid principal balance	967		967		920
Loans, average recorded investment	963	1,789	947	1,800
Loans, interest income recognized	4	5	9	18
Construction Industry [Member]
Financing Receivable, Impaired [Line Items]
Loans with no related allowance recorded, related allowance	0		0		0
Loans with an allowance recorded:
Loans with an allowance recorded, recorded investment	0		0		0
Loans with an allowance recorded, unpaid principal balance	0		0		0
Loans, related allowance	0		0		0
Loans with an allowance recorded, average recorded investment	0	35	0	48
Loans with an allowance recorded, interest income recognized	0	0	0	0
Loans, recorded investment	87		87		93
Loans, unpaid principal balance	247		247		296
Loans, average recorded investment	89	117	90	136
Loans, interest income recognized	0	0	0	0
Commercial Business Other [Member]
Financing Receivable, Impaired [Line Items]
Loans with no related allowance recorded, related allowance	757		757		589
Loans with an allowance recorded:
Loans with an allowance recorded, recorded investment	1,277		1,277		1,188
Loans with an allowance recorded, unpaid principal balance	1,829		1,829		1,984
Loans, related allowance	757		757		589
Loans with an allowance recorded, average recorded investment	1,043	1,838	1,091	1,953
Loans with an allowance recorded, interest income recognized	7	11	17	19
Loans, recorded investment	1,277		1,277		1,188
Loans, unpaid principal balance	1,829		1,829		1,984
Loans, average recorded investment	1,043	1,840	1,091	1,965
Loans, interest income recognized	$ 7	$ 11	$ 17	$ 19