Note 7 - Fair Value of Financial Instruments (Details) - Assets Measured On Non-recurring Basis - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Impaired loans:
Residential mortgages - closed end	$ 6,844	$ 2,408
Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Impaired loans:
Residential mortgages - closed end	$ 3,716	1,083
Residential Portfolio Segment [Member] | Fair Value, Measurements, Nonrecurring [Member] | Home Equity Loan [Member]
Impaired loans:
Residential mortgages - closed end		173
Fair Value, Inputs, Level 3 [Member] | Residential Portfolio Segment [Member] | Fair Value, Measurements, Nonrecurring [Member] | Home Equity Loan [Member]
Impaired loans:
Residential mortgages - closed end		$ 173