Note 8 - Loans (Details) - Troubled Debt Restructuring $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)
Note 8 - Loans (Details) - Troubled Debt Restructuring [Line Items]
No. of Loans	27	14
Pre-Modification Recorded Investment	$ 19,007	$ 24,817
Post-Modification Recorded Investment	18,859	24,817
Charge-offs	148
Special Reserve	$ 84	$ 606
Commercial Portfolio Segment [Member]
Note 8 - Loans (Details) - Troubled Debt Restructuring [Line Items]
No. of Loans	3	6
Pre-Modification Recorded Investment	$ 1,156	$ 10,773
Post-Modification Recorded Investment	1,156	10,773
Special Reserve	$ 1	$ 26
Commercial Real Estate Portfolio Segment [Member]
Note 8 - Loans (Details) - Troubled Debt Restructuring [Line Items]
No. of Loans	19	3
Pre-Modification Recorded Investment	$ 16,329	$ 11,818
Post-Modification Recorded Investment	16,329	11,818
Special Reserve	$ 38	$ 564
Residential Mortgage and Equity Lines Portfolio Segment [Member]
Note 8 - Loans (Details) - Troubled Debt Restructuring [Line Items]
No. of Loans	5	5
Pre-Modification Recorded Investment	$ 1,522	$ 2,226
Post-Modification Recorded Investment	1,374	2,226
Charge-offs	148
Special Reserve	$ 45	$ 16