Note 4 - TDRs Pre-Modification and Post-Modification (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Performing Financial Instruments [Member] | Residential Portfolio Segment [Member] | Interest Only Payments [Member]
TDR’s Performing to Modified Terms Pre- Modification Recorded Investment	$ 495		$ 495
TDR’s Performing to Modified Terms Post- Modification Recorded Investment	495		495
Performing Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Interest Only Payments [Member]
TDR’s Performing to Modified Terms Pre- Modification Recorded Investment		$ 238
TDR’s Performing to Modified Terms Post- Modification Recorded Investment		238
Performing Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Interest Rate Below Market Reduction [Member]
TDR’s Performing to Modified Terms Pre- Modification Recorded Investment		575
TDR’s Performing to Modified Terms Post- Modification Recorded Investment		575
Performing Financial Instruments [Member]
TDR’s Performing to Modified Terms Pre- Modification Recorded Investment	495	813	495
TDR’s Performing to Modified Terms Post- Modification Recorded Investment	495	$ 813	$ 495
Nonperforming Financial Instruments [Member] | Residential Portfolio Segment [Member] | Interest Only Payments [Member]
TDR’s Performing to Modified Terms Pre- Modification Recorded Investment
TDR’s Performing to Modified Terms Post- Modification Recorded Investment
Nonperforming Financial Instruments [Member]
TDR’s Performing to Modified Terms Pre- Modification Recorded Investment
TDR’s Performing to Modified Terms Post- Modification Recorded Investment