Note 6 - Loans (Details) - Troubled Debt Restructurings With Subsequent Default $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)
Note 6 - Loans (Details) - Troubled Debt Restructurings With Subsequent Default [Line Items]
Number of contracts	1	3	1	4
Recorded investment	$ 695	$ 3,398	$ 695	$ 3,484
Commercial Portfolio Segment [Member]
Note 6 - Loans (Details) - Troubled Debt Restructurings With Subsequent Default [Line Items]
Number of contracts	1	2	1	2
Recorded investment	$ 695	$ 3,007	$ 695	$ 3,007
Commercial Real Estate Portfolio Segment [Member]
Note 6 - Loans (Details) - Troubled Debt Restructurings With Subsequent Default [Line Items]
Number of contracts				1
Recorded investment				$ 391
Commercial Real Estate Portfolio Segment [Member] | Other Loan [Member]
Note 6 - Loans (Details) - Troubled Debt Restructurings With Subsequent Default [Line Items]
Number of contracts		1
Recorded investment		$ 391
Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Note 6 - Loans (Details) - Troubled Debt Restructurings With Subsequent Default [Line Items]
Number of contracts				1
Recorded investment				$ 86