Note 4 - Loans and Allowance for Loan Losses (Details) - Loans Modified as Troubled Debt Restructurings Within the Previous Twelve Months That Became Over 30 Days Past Due (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Commercial:
Loans modified, over 30 days past due, number of contracts	0	0	0	0
Loans modified, over 30 days past due, recorded principal balance	$ 0	$ 0	$ 0	$ 0
Commercial and Industrial [Member]
Commercial:
Loans modified, over 30 days past due, number of contracts	0	0	0	0
Loans modified, over 30 days past due, recorded principal balance	0	0	0	0
Commercial Vacant Land and Land Development and Residential Construction Loan [Member]
Commercial:
Loans modified, over 30 days past due, number of contracts	0	0	0	0
Loans modified, over 30 days past due, recorded principal balance	0	0	0	0
Commercial Real Estate Owner Occupied Loan [Member]
Commercial:
Loans modified, over 30 days past due, number of contracts	0	0	0	0
Loans modified, over 30 days past due, recorded principal balance	0	0	0	0
Commercial Real Estate Non Owner Occupied Loan [Member]
Commercial:
Loans modified, over 30 days past due, number of contracts	0	0	0	0
Loans modified, over 30 days past due, recorded principal balance	0	0	0	0
Commercial Real Estate Multi Family and Residential Rental Loan [Member]
Commercial:
Loans modified, over 30 days past due, number of contracts	0	0	0	0
Loans modified, over 30 days past due, recorded principal balance	0	0	0	0
Commercial Portfolio Segment [Member]
Commercial:
Loans modified, over 30 days past due, number of contracts	0	0	0	0
Loans modified, over 30 days past due, recorded principal balance	0	0	0	0
Retail Home Equity and Other [Member]
Commercial:
Loans modified, over 30 days past due, number of contracts	0	0	0	0
Loans modified, over 30 days past due, recorded principal balance	0	0	0	0
Retail 1-4 Family Mortgages [Member]
Commercial:
Loans modified, over 30 days past due, number of contracts	0	0	0	0
Loans modified, over 30 days past due, recorded principal balance	0	0	0	0
Retail Loan [Member]
Commercial:
Loans modified, over 30 days past due, number of contracts	0	0	0	0
Loans modified, over 30 days past due, recorded principal balance	$ 0	$ 0	$ 0	$ 0