Note 4 - Loans and Allowance for Loan Losses (Details) - Loans Modified as Troubled Debt Restructurings (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Commercial:
Loans modified, number of contracts	1		3
Loans modified, pre-modification recorded principal balance	$ 996,000		$ 1,156,000
Loans modified, post-modification recorded principal balance	996,000		1,156,000
Commercial and Industrial [Member] | Originated Loan [Member]
Commercial:
Loans modified, number of contracts	0	1	1	1
Loans modified, pre-modification recorded principal balance	0	60,000	14,000	60,000
Loans modified, post-modification recorded principal balance	0	60,000	14,000	60,000
Commercial and Industrial [Member] | Acquired Loan [Member]
Commercial:
Loans modified, number of contracts	0		0
Loans modified, pre-modification recorded principal balance	0		0
Loans modified, post-modification recorded principal balance	0		0
Commercial and Industrial [Member]
Commercial:
Loans modified, number of contracts	0		1
Loans modified, pre-modification recorded principal balance	0		14,000
Loans modified, post-modification recorded principal balance	0		14,000
Commercial Vacant Land and Land Development and Residential Construction Loan [Member] | Originated Loan [Member]
Commercial:
Loans modified, number of contracts	0	2	0	2
Loans modified, pre-modification recorded principal balance	0	3,247,000	0	3,247,000
Loans modified, post-modification recorded principal balance	0	3,247,000	0	3,247,000
Commercial Vacant Land and Land Development and Residential Construction Loan [Member] | Acquired Loan [Member]
Commercial:
Loans modified, number of contracts	0		0
Loans modified, pre-modification recorded principal balance	0		0
Loans modified, post-modification recorded principal balance	0		0
Commercial Vacant Land and Land Development and Residential Construction Loan [Member]
Commercial:
Loans modified, number of contracts	0		0
Loans modified, pre-modification recorded principal balance	0		0
Loans modified, post-modification recorded principal balance	0		0
Commercial Real Estate Owner Occupied Loan [Member] | Originated Loan [Member]
Commercial:
Loans modified, number of contracts	1	2	1	3
Loans modified, pre-modification recorded principal balance	996,000	680,000	996,000	904,000
Loans modified, post-modification recorded principal balance	996,000	680,000	996,000	904,000
Commercial Real Estate Owner Occupied Loan [Member] | Acquired Loan [Member]
Commercial:
Loans modified, number of contracts	0		0
Loans modified, pre-modification recorded principal balance	0		0
Loans modified, post-modification recorded principal balance	0		0
Commercial Real Estate Owner Occupied Loan [Member]
Commercial:
Loans modified, number of contracts	1		1
Loans modified, pre-modification recorded principal balance	996,000		996,000
Loans modified, post-modification recorded principal balance	996,000		996,000
Commercial Real Estate Non Owner Occupied Loan [Member] | Originated Loan [Member]
Commercial:
Loans modified, number of contracts	0	0	1	2
Loans modified, pre-modification recorded principal balance	0	0	146,000	2,068,000
Loans modified, post-modification recorded principal balance	0	0	146,000	2,068,000
Commercial Real Estate Non Owner Occupied Loan [Member] | Acquired Loan [Member]
Commercial:
Loans modified, number of contracts	0		0
Loans modified, pre-modification recorded principal balance	0		0
Loans modified, post-modification recorded principal balance	0		0
Commercial Real Estate Non Owner Occupied Loan [Member]
Commercial:
Loans modified, number of contracts	0		1
Loans modified, pre-modification recorded principal balance	0		146,000
Loans modified, post-modification recorded principal balance	0		146,000
Commercial Real Estate Multi Family and Residential Rental Loan [Member] | Originated Loan [Member]
Commercial:
Loans modified, number of contracts	0	0	0	0
Loans modified, pre-modification recorded principal balance	0	0	0	0
Loans modified, post-modification recorded principal balance	0	0	0	0
Commercial Real Estate Multi Family and Residential Rental Loan [Member] | Acquired Loan [Member]
Commercial:
Loans modified, number of contracts	0		0
Loans modified, pre-modification recorded principal balance	0		0
Loans modified, post-modification recorded principal balance	0		0
Commercial Real Estate Multi Family and Residential Rental Loan [Member]
Commercial:
Loans modified, number of contracts	0		0
Loans modified, pre-modification recorded principal balance	0		0
Loans modified, post-modification recorded principal balance	0		0
Commercial Portfolio Segment [Member] | Originated Loan [Member]
Commercial:
Loans modified, number of contracts	1	5	3	8
Loans modified, pre-modification recorded principal balance	996,000	3,987,000	1,156,000	6,279,000
Loans modified, post-modification recorded principal balance	996,000	3,987,000	1,156,000	6,279,000
Commercial Portfolio Segment [Member] | Acquired Loan [Member]
Commercial:
Loans modified, number of contracts	0		0
Loans modified, pre-modification recorded principal balance	0		0
Loans modified, post-modification recorded principal balance	0		0
Commercial Portfolio Segment [Member]
Commercial:
Loans modified, number of contracts	1		3
Loans modified, pre-modification recorded principal balance	996,000		1,156,000
Loans modified, post-modification recorded principal balance	996,000		1,156,000
Retail Home Equity and Other [Member] | Originated Loan [Member]
Commercial:
Loans modified, number of contracts	0	0	0	0
Loans modified, pre-modification recorded principal balance	0	0	0	0
Loans modified, post-modification recorded principal balance	0	0	0	0
Retail Home Equity and Other [Member] | Acquired Loan [Member]
Commercial:
Loans modified, number of contracts	0		0
Loans modified, pre-modification recorded principal balance	0		0
Loans modified, post-modification recorded principal balance	0		0
Retail Home Equity and Other [Member]
Commercial:
Loans modified, number of contracts	0		0
Loans modified, pre-modification recorded principal balance	0		0
Loans modified, post-modification recorded principal balance	0		0
Retail 1-4 Family Mortgages [Member] | Originated Loan [Member]
Commercial:
Loans modified, number of contracts	0	1	0	1
Loans modified, pre-modification recorded principal balance	0	1,879,000	0	1,879,000
Loans modified, post-modification recorded principal balance	0	1,879,000	0	1,879,000
Retail 1-4 Family Mortgages [Member] | Acquired Loan [Member]
Commercial:
Loans modified, number of contracts	0		0
Loans modified, pre-modification recorded principal balance	0		0
Loans modified, post-modification recorded principal balance	0		0
Retail 1-4 Family Mortgages [Member]
Commercial:
Loans modified, number of contracts	0		0
Loans modified, pre-modification recorded principal balance	0		0
Loans modified, post-modification recorded principal balance	0		0
Retail Loan [Member] | Originated Loan [Member]
Commercial:
Loans modified, number of contracts	0	1	0	1
Loans modified, pre-modification recorded principal balance	0	1,879,000	0	1,879,000
Loans modified, post-modification recorded principal balance	0	1,879,000	0	1,879,000
Retail Loan [Member] | Acquired Loan [Member]
Commercial:
Loans modified, number of contracts	0		0
Loans modified, pre-modification recorded principal balance	0		0
Loans modified, post-modification recorded principal balance	0		0
Retail Loan [Member]
Commercial:
Loans modified, number of contracts	0		0
Loans modified, pre-modification recorded principal balance	0		0
Loans modified, post-modification recorded principal balance	0		0
Originated Loan [Member]
Commercial:
Loans modified, number of contracts	1	6	3	9
Loans modified, pre-modification recorded principal balance	996,000	5,866,000	1,156,000	8,158,000
Loans modified, post-modification recorded principal balance	996,000	5,866,000	1,156,000	8,158,000
Acquired Loan [Member]
Commercial:
Loans modified, number of contracts	0		0
Loans modified, pre-modification recorded principal balance	0		0
Loans modified, post-modification recorded principal balance	$ 0		$ 0