Note 6 - Loans (Details) - Newly Restructured Loans and Types of Modifications - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Note 6 - Loans (Details) - Newly Restructured Loans and Types of Modifications [Line Items]
Newly restructured loans	$ 148	$ 5,260	$ 1,366	$ 5,413
Contractual Interest Rate Reduction [Member]
Note 6 - Loans (Details) - Newly Restructured Loans and Types of Modifications [Line Items]
Newly restructured loans		57	115	209
Rate & Maturity [Member]
Note 6 - Loans (Details) - Newly Restructured Loans and Types of Modifications [Line Items]
Newly restructured loans	45	5,165	45	5,165
Rate Reduction and Payment Deferral [Member]
Note 6 - Loans (Details) - Newly Restructured Loans and Types of Modifications [Line Items]
Newly restructured loans		38	266	39
Payment Deferral [Member]
Note 6 - Loans (Details) - Newly Restructured Loans and Types of Modifications [Line Items]
Newly restructured loans	103		940
Commercial Portfolio Segment [Member]
Note 6 - Loans (Details) - Newly Restructured Loans and Types of Modifications [Line Items]
Newly restructured loans	45	5,165	779	5,165
Commercial Portfolio Segment [Member] | Rate & Maturity [Member]
Note 6 - Loans (Details) - Newly Restructured Loans and Types of Modifications [Line Items]
Newly restructured loans	45	5,165	45	5,165
Commercial Portfolio Segment [Member] | Payment Deferral [Member]
Note 6 - Loans (Details) - Newly Restructured Loans and Types of Modifications [Line Items]
Newly restructured loans			734
Residential Portfolio Segment [Member] | Individual Tax Identification Number Loan [Member] | Real Estate Loan [Member]
Note 6 - Loans (Details) - Newly Restructured Loans and Types of Modifications [Line Items]
Newly restructured loans	103	95	587	248
Residential Portfolio Segment [Member] | Individual Tax Identification Number Loan [Member] | Real Estate Loan [Member] | Contractual Interest Rate Reduction [Member]
Note 6 - Loans (Details) - Newly Restructured Loans and Types of Modifications [Line Items]
Newly restructured loans		57	115	209
Residential Portfolio Segment [Member] | Individual Tax Identification Number Loan [Member] | Real Estate Loan [Member] | Rate Reduction and Payment Deferral [Member]
Note 6 - Loans (Details) - Newly Restructured Loans and Types of Modifications [Line Items]
Newly restructured loans		$ 38	266	$ 39
Residential Portfolio Segment [Member] | Individual Tax Identification Number Loan [Member] | Real Estate Loan [Member] | Payment Deferral [Member]
Note 6 - Loans (Details) - Newly Restructured Loans and Types of Modifications [Line Items]
Newly restructured loans	$ 103		$ 206