Note 5 - Loans - Loans Modified and Classified as TDR (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)
Financing Receivable, Modifications, Balance	$ 4,289	$ 1,002
Financing Receivable, Modifications, Number of Contracts	5	4
Taxi Medallion Portfolio Segment [Member] | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modifications, Balance	$ 4,289
Financing Receivable, Modifications, Number of Contracts	5
One-To-Four Family - Residential Portfolio Segment [Member] | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modifications, Balance		$ 263
Financing Receivable, Modifications, Number of Contracts		2
Commercial Business and Other Portfolio Segment [Member] | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modifications, Balance		$ 739
Financing Receivable, Modifications, Number of Contracts		2