Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans - USD ($)	Jun. 30, 2015	Dec. 31, 2014
Nonperforming Financial Instruments [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Nonperforming loans	$ 8,103,000	$ 29,432,000
Originated Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Originated Loan [Member] | Nonperforming Financial Instruments [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Nonaccrual loans	2,893,000	26,048,000
Nonperforming loans	2,893,000	26,048,000
Acquired Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	26,000
Acquired Loan [Member] | Nonperforming Financial Instruments [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	26,000
Nonaccrual loans	5,210,000	3,358,000
Nonperforming loans	5,210,000	3,384,000
Commercial Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Nonperforming loans	5,845,000	25,233,000
Commercial Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Commercial and Industrial [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Nonperforming loans	278,000	6,478,000
Commercial Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Nonperforming loans	183,000	209,000
Commercial Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Real Estate Owner Occupied Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Nonperforming loans	2,558,000	18,062,000
Commercial Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Real Estate Non Owner Occupied Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Nonperforming loans	246,000	378,000
Commercial Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Nonperforming loans	2,580,000	106,000
Commercial Portfolio Segment [Member] | Originated Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Commercial and Industrial [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Owner Occupied Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Non Owner Occupied Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Acquired Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Commercial and Industrial [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Owner Occupied Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Non Owner Occupied Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Retail Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Nonperforming loans	2,258,000	4,199,000
Retail Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Home Equity and Other [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Nonperforming loans	749,000	800,000
Retail Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | 1-4 Family Mortgages [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Nonperforming loans	1,509,000	3,399,000
Retail Portfolio Segment [Member] | Originated Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Retail Portfolio Segment [Member] | Originated Loan [Member] | Home Equity and Other [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Retail Portfolio Segment [Member] | Originated Loan [Member] | 1-4 Family Mortgages [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	0
Retail Portfolio Segment [Member] | Acquired Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	26,000
Retail Portfolio Segment [Member] | Acquired Loan [Member] | Home Equity and Other [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	0	26,000
Retail Portfolio Segment [Member] | Acquired Loan [Member] | 1-4 Family Mortgages [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Nonperforming Loans [Line Items]
Loans past due 90 days or more still accruing interest	$ 0	$ 0