Note 4 - Loans and Allowance for Loan Losses (Details) - Activity for Troubled Debt Restructurings - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Commercial and Industrial [Member]
Commercial Loan Portfolio:
Beginning Balance	$ 6,556,000	$ 1,404,000	$ 7,026,000	$ 1,656,000
Ending Balance	2,442,000	1,176,000	2,442,000	1,176,000
Charge-Offs	0	(67,000)	0	(67,000)
Payments	(5,380,000)	(161,000)	(6,535,000)	(427,000)
Transfers to ORE	0	0	0	0
Net Additions/Deletions	1,266,000	0	1,951,000	14,000
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Commercial Loan Portfolio:
Beginning Balance	2,654,000	4,250,000	2,680,000	4,501,000
Ending Balance	2,632,000	3,786,000	2,632,000	3,786,000
Charge-Offs	0	0	0	0
Payments	(22,000)	(464,000)	(48,000)	(3,613,000)
Transfers to ORE	0	0	0	0
Net Additions/Deletions	0	0	0	2,898,000
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Owner Occupied Loan [Member]
Commercial Loan Portfolio:
Beginning Balance	16,966,000	1,756,000	17,160,000	1,816,000
Ending Balance	2,218,000	2,711,000	2,218,000	2,711,000
Charge-Offs	(4,198,000)	0	(4,198,000)	(11,000)
Payments	(10,550,000)	(42,000)	(10,744,000)	(90,000)
Transfers to ORE	0	0	0	0
Net Additions/Deletions	0	997,000	0	996,000
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Non Owner Occupied Loan [Member]
Commercial Loan Portfolio:
Beginning Balance	16,063,000	21,629,000	17,439,000	22,311,000
Ending Balance	11,082,000	18,663,000	11,082,000	18,663,000
Charge-Offs	0	0	0	0
Payments	(4,981,000)	(2,966,000)	(6,357,000)	(3,967,000)
Transfers to ORE	0	0	0	0
Net Additions/Deletions	0	0	0	319,000
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Commercial Loan Portfolio:
Beginning Balance	498,000	732,000	505,000	2,620,000
Ending Balance	491,000	719,000	491,000	719,000
Charge-Offs	0	0	0	(420,000)
Payments	(7,000)	(13,000)	(14,000)	(1,481,000)
Transfers to ORE	0	0	0	0
Net Additions/Deletions	0	0	0	0
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Commercial and Industrial [Member]
Commercial Loan Portfolio:
Beginning Balance	1,519,000		1,439,000
Ending Balance	1,521,000		1,521,000
Charge-Offs	0		0
Payments	(275,000)		(275,000)
Transfers to ORE	0		0
Net Additions/Deletions	277,000		357,000
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Commercial Loan Portfolio:
Beginning Balance	0		0
Ending Balance	0		0
Charge-Offs	0		0
Payments	0		0
Transfers to ORE	0		0
Net Additions/Deletions	0		0
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Owner Occupied Loan [Member]
Commercial Loan Portfolio:
Beginning Balance	1,492,000		1,569,000
Ending Balance	1,350,000		1,350,000
Charge-Offs	(31,000)		(31,000)
Payments	(292,000)		(471,000)
Transfers to ORE	0		0
Net Additions/Deletions	181,000		283,000
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Non Owner Occupied Loan [Member]
Commercial Loan Portfolio:
Beginning Balance	62,000		64,000
Ending Balance	361,000		361,000
Charge-Offs	0		0
Payments	0		(2,000)
Transfers to ORE	0		0
Net Additions/Deletions	299,000		299,000
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Commercial Loan Portfolio:
Beginning Balance	333,000		381,000
Ending Balance	580,000		580,000
Charge-Offs	0		0
Payments	(6,000)		(54,000)
Transfers to ORE	0		0
Net Additions/Deletions	253,000		253,000
Retail Portfolio Segment [Member] | Originated Loan [Member] | Home Equity and Other [Member]
Commercial Loan Portfolio:
Beginning Balance	0	0	0	0
Ending Balance	0	0	0	0
Charge-Offs	0	0	0	0
Payments	0	0	0	0
Transfers to ORE	0	0	0	0
Net Additions/Deletions	0	0	0	0
Retail Portfolio Segment [Member] | Originated Loan [Member] | 1-4 Family Mortgages [Member]
Commercial Loan Portfolio:
Beginning Balance	302,000	2,122,000	1,967,000	2,191,000
Ending Balance	270,000	2,077,000	270,000	2,077,000
Charge-Offs	(23,000)	0	(148,000)	0
Payments	(9,000)	(45,000)	(1,549,000)	(114,000)
Transfers to ORE	0	0	0	0
Net Additions/Deletions	0	$ 0	0	$ 0
Retail Portfolio Segment [Member] | Acquired Loan [Member] | Home Equity and Other [Member]
Commercial Loan Portfolio:
Beginning Balance	0		26,000
Ending Balance	152,000		152,000
Charge-Offs	0		0
Payments	0		(26,000)
Transfers to ORE	0		0
Net Additions/Deletions	152,000		152,000
Retail Portfolio Segment [Member] | Acquired Loan [Member] | 1-4 Family Mortgages [Member]
Commercial Loan Portfolio:
Beginning Balance	177,000		178,000
Ending Balance	177,000		177,000
Charge-Offs	0		0
Payments	0		(1,000)
Transfers to ORE	0		0
Net Additions/Deletions	$ 0		$ 0