Note 4 - Loans and Allowance for Loan Losses (Details) - Allowance Related to Troubled Debt Restructurings (USD $)	Jun. 30, 2014	Dec. 31, 2013
Commercial:
Allowance for losses, troubled debt restructurings	$ 8,864,000	$ 10,351,000
Commercial and Industrial [Member]
Commercial:
Allowance for losses, troubled debt restructurings	60,000	187,000
Commercial Vacant Land and Land Development and Residential Construction Loan [Member]
Commercial:
Allowance for losses, troubled debt restructurings	341,000	798,000
Commercial Real Estate Owner Occupied Loan [Member]
Commercial:
Allowance for losses, troubled debt restructurings	679,000	528,000
Commercial Real Estate Non Owner Occupied Loan [Member]
Commercial:
Allowance for losses, troubled debt restructurings	7,285,000	7,828,000
Commercial Real Estate Multi Family and Residential Rental Loan [Member]
Commercial:
Allowance for losses, troubled debt restructurings	499,000	1,010,000
Commercial Portfolio Segment [Member]
Commercial:
Allowance for losses, troubled debt restructurings	8,864,000	10,351,000
Retail Home Equity and Other [Member]
Commercial:
Allowance for losses, troubled debt restructurings	0	0
Retail 1-4 Family Mortgages [Member]
Commercial:
Allowance for losses, troubled debt restructurings	0	0
Retail Loan [Member]
Commercial:
Allowance for losses, troubled debt restructurings	$ 0	$ 0