Note 5 - Loans - Loans Modified and Classified as TDR (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)
Number	4	9	4
Balance	$ 1,306	$ 5,595	$ 1,002
Taxi Medallion Portfolio Segment [Member] | Interest Rate Below Market Reduction [Member]
Number	4	9
Balance	$ 1,306	$ 5,595
One-To-Four Family - Residential [Member] | Interest Rate Below Market Reduction [Member]
Number			2
Balance			$ 263
Commercial Business and Other Portfolio Segment [Member] | Interest Rate Below Market Reduction [Member]
Number			2
Balance			$ 739