Note 3 - Loans and Allowance for Loan Losses (Details) - Activity for Troubled Debt Restructurings - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Commercial and Industrial [Member]
Commercial Loan Portfolio:
Beginning Balance	$ 2,442,000	$ 1,176,000	$ 7,026,000	$ 1,656,000
Ending Balance	2,084,000	7,265,000	2,084,000	7,265,000
Charge-Offs	0	0	0	(67,000)
Payments	(56,000)	(205,000)	(6,591,000)	(632,000)
Transfers to ORE	0	(21,000)	0	(21,000)
Net Additions/Deletions	(302,000)	6,315,000	1,649,000	6,329,000
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Commercial Loan Portfolio:
Beginning Balance	2,632,000	3,786,000	2,680,000	4,501,000
Ending Balance	2,360,000	3,499,000	2,360,000	3,499,000
Charge-Offs	0	0	0	0
Payments	(272,000)	(287,000)	(320,000)	(3,901,000)
Transfers to ORE	0	0	0	0
Net Additions/Deletions	0	0	0	2,899,000
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Owner Occupied Loan [Member]
Commercial Loan Portfolio:
Beginning Balance	2,218,000	2,711,000	17,160,000	1,816,000
Ending Balance	1,927,000	19,368,000	1,927,000	19,368,000
Charge-Offs	0	0	(4,198,000)	(11,000)
Payments	(291,000)	(91,000)	(11,035,000)	(181,000)
Transfers to ORE	0	0	0	0
Net Additions/Deletions	0	16,748,000	0	17,744,000
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Non Owner Occupied Loan [Member]
Commercial Loan Portfolio:
Beginning Balance	11,082,000	18,664,000	17,439,000	22,311,000
Ending Balance	10,758,000	18,009,000	10,758,000	18,009,000
Charge-Offs	0	0	0	0
Payments	(324,000)	(655,000)	(6,681,000)	(4,621,000)
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	491,000	719,000	505,000	2,620,000
Ending Balance	484,000	589,000	484,000	589,000
Charge-Offs	0	0	0	(420,000)
Payments	(7,000)	(130,000)	(21,000)	(1,611,000)
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	1,521,000		1,439,000
Ending Balance	1,197,000		1,197,000
Charge-Offs	0		0
Payments	(324,000)		(597,000)
Transfers to ORE	0		0
Net Additions/Deletions	0		355,000
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	1,350,000		1,569,000
Ending Balance	1,273,000		1,273,000
Charge-Offs	0		0
Payments	(77,000)		(296,000)
Transfers to ORE	0		0
Net Additions/Deletions	0		0
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Non Owner Occupied Loan [Member]
Commercial Loan Portfolio:
Beginning Balance	361,000		64,000
Ending Balance	592,000		592,000
Charge-Offs	0		0
Payments	(5,000)		(6,000)
Transfers to ORE	0		0
Net Additions/Deletions	236,000		534,000
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Commercial Loan Portfolio:
Beginning Balance	580,000		381,000
Ending Balance	264,000		264,000
Charge-Offs	(42,000)		(42,000)
Payments	(274,000)		(329,000)
Transfers to ORE	0		0
Net Additions/Deletions	0		254,000
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	270,000	2,077,000	1,967,000	2,191,000
Ending Balance	267,000	2,026,000	267,000	2,026,000
Charge-Offs	0	0	(148,000)	0
Payments	(3,000)	(51,000)	(1,552,000)	(165,000)
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	152,000		26,000
Ending Balance	147,000		147,000
Charge-Offs	0		0
Payments	(5,000)		(32,000)
Transfers to ORE	0		0
Net Additions/Deletions	0		153,000
Retail Portfolio Segment [Member] | Acquired Loan [Member] | 1-4 Family Mortgages [Member]
Commercial Loan Portfolio:
Beginning Balance	177,000		178,000
Ending Balance	176,000		176,000
Charge-Offs	0		0
Payments	(1,000)		(2,000)
Transfers to ORE	0		0
Net Additions/Deletions	$ 0		$ 0