Note 5 - Non-performing Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Multi-family Residential Portfolio Segment [Member] | Mortgage Receivable [Member]
Loans ninety days or more past due and still accruing:
Non-accrual loans	$ 3,162	$ 3,561
Multi-family Residential Portfolio Segment [Member]
Loans ninety days or more past due and still accruing:
Loans ninety days or more past due and still accruing	574	233
Commercial Real Estate Portfolio Segment [Member] | Mortgage Receivable [Member]
Loans ninety days or more past due and still accruing:
Non-accrual loans	2,299	2,398
Commercial Real Estate Portfolio Segment [Member]
Loans ninety days or more past due and still accruing:
Loans ninety days or more past due and still accruing	320	1,183
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Mortgage Receivable [Member]
Loans ninety days or more past due and still accruing:
Non-accrual loans	6,005	5,952
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member]
Loans ninety days or more past due and still accruing:
Loans ninety days or more past due and still accruing	635	611
One-To-Four Family - Residential Portfolio Segment [Member] | Mortgage Receivable [Member]
Loans ninety days or more past due and still accruing:
Non-accrual loans	8,406	10,120
One-To-Four Family - Residential Portfolio Segment [Member]
Loans ninety days or more past due and still accruing:
Loans ninety days or more past due and still accruing	13	13
Construction Portfolio Segment [Member]
Loans ninety days or more past due and still accruing:
Loans ninety days or more past due and still accruing		1,000
Commercial Business and Other Portfolio Segment [Member] | Non-Mortgage Loans [Member]
Loans ninety days or more past due and still accruing:
Non-accrual loans	128	568
Commercial Business and Other Portfolio Segment [Member]
Loans ninety days or more past due and still accruing:
Loans ninety days or more past due and still accruing		220
Small Business Administration Portfolio Segment [Member] | Non-Mortgage Loans [Member]
Loans ninety days or more past due and still accruing:
Non-accrual loans	185	218
Taxi Medallion [Member] | Non-Mortgage Loans [Member]
Loans ninety days or more past due and still accruing:
Non-accrual loans	196
Mortgage Receivable [Member]
Loans ninety days or more past due and still accruing:
Non-accrual loans	19,872	22,031
Non-Mortgage Loans [Member]
Loans ninety days or more past due and still accruing:
Non-accrual loans	509	786
Loans ninety days or more past due and still accruing	1,542	3,260
Non-accrual loans	20,381	22,817
Total non-accrual loans and loans ninety days or more past due and still accruing	$ 21,923	$ 26,077