Note 6 - Loans (Details) - Newly Restructured Loans and Types of Modifications - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Note 6 - Loans (Details) - Newly Restructured Loans and Types of Modifications [Line Items]
Newly restructured loans	$ 209	$ 153	$ 1,239	$ 845
Contractual Interest Rate Reduction [Member]
Note 6 - Loans (Details) - Newly Restructured Loans and Types of Modifications [Line Items]
Newly restructured loans		153	112	153
Rate Reduction and Payment Deferral [Member]
Note 6 - Loans (Details) - Newly Restructured Loans and Types of Modifications [Line Items]
Newly restructured loans	209		262
Payment Deferral [Member]
Note 6 - Loans (Details) - Newly Restructured Loans and Types of Modifications [Line Items]
Newly restructured loans			865
Extended Maturity [Member]
Note 6 - Loans (Details) - Newly Restructured Loans and Types of Modifications [Line Items]
Newly restructured loans				692
Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Note 6 - Loans (Details) - Newly Restructured Loans and Types of Modifications [Line Items]
Newly restructured loans	209	153	478	153
Residential Portfolio Segment [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		$ 153	112	153
Residential Portfolio Segment [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	$ 209		262
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Payment Deferral [Member]
Note 6 - Loans (Details) - Newly Restructured Loans and Types of Modifications [Line Items]
Newly restructured loans			104
Commercial Portfolio Segment [Member]
Note 6 - Loans (Details) - Newly Restructured Loans and Types of Modifications [Line Items]
Newly restructured loans			761	692
Commercial Portfolio Segment [Member] | Payment Deferral [Member]
Note 6 - Loans (Details) - Newly Restructured Loans and Types of Modifications [Line Items]
Newly restructured loans			$ 761
Commercial Portfolio Segment [Member] | Extended Maturity [Member]
Note 6 - Loans (Details) - Newly Restructured Loans and Types of Modifications [Line Items]
Newly restructured loans				$ 692