Note 5 - Loans (Details) - Nonaccrual Loans, Segregated by Loan Class - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Note 5 - Loans (Details) - Nonaccrual Loans, Segregated by Loan Class [Line Items]
Nonaccrual loans	$ 14,009	$ 21,649
Commercial Portfolio Segment [Member]
Note 5 - Loans (Details) - Nonaccrual Loans, Segregated by Loan Class [Line Items]
Nonaccrual loans	1,994	5,112
Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member]
Note 5 - Loans (Details) - Nonaccrual Loans, Segregated by Loan Class [Line Items]
Nonaccrual loans	5,488	8,318
Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member]
Note 5 - Loans (Details) - Nonaccrual Loans, Segregated by Loan Class [Line Items]
Nonaccrual loans	1,071	1,378
Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Note 5 - Loans (Details) - Nonaccrual Loans, Segregated by Loan Class [Line Items]
Nonaccrual loans		24
Residential Portfolio Segment [Member] | Individual Tax Identification Number Loan [Member] | Real Estate Loan [Member]
Note 5 - Loans (Details) - Nonaccrual Loans, Segregated by Loan Class [Line Items]
Nonaccrual loans	3,649	4,647
Residential Portfolio Segment [Member] | Mortgage Receivable [Member] | Real Estate Loan [Member]
Note 5 - Loans (Details) - Nonaccrual Loans, Segregated by Loan Class [Line Items]
Nonaccrual loans	1,775	2,135
Consumer Portfolio Segment [Member]
Note 5 - Loans (Details) - Nonaccrual Loans, Segregated by Loan Class [Line Items]
Nonaccrual loans	$ 32	$ 35