Note 8 - Loans and Allowance for Loan Losses (Details) - Non-Accrual Loans - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Commercial:
Loans 90 days or more past due and still accruing	$ 52
Non-accrual loans	8,082	$ 10,770
Commercial Portfolio Segment [Member] | Commercial and Industrial Loans [Member]
Commercial:
Non-accrual loans	3,488	2,171
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Commercial:
Non-accrual loans		337
Commercial Portfolio Segment [Member] | Secured by Commercial Real Estate [Member]
Commercial:
Non-accrual loans	2,621	6,465
Commercial Portfolio Segment [Member] | Secured by Residential Real Estate [Member]
Commercial:
Non-accrual loans	1,443	1,467
Finance Leases Portfolio Segment [Member]
Commercial:
Loans 90 days or more past due and still accruing	52
Non-accrual loans	80
Retail Portfolio Segment [Member] | 1-4 Family Residential Mortgages [Member]
Commercial:
Non-accrual loans	292	225
Retail Portfolio Segment [Member] | Home Equity Loan [Member]
Commercial:
Non-accrual loans	131	104
Retail Portfolio Segment [Member] | Consumer Loans [Member]
Commercial:
Non-accrual loans	$ 27	$ 1