Note 5 - Loans - Loans Designated as Criticized or Classified (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Loans designated as criticized or classified	$ 72,557	$ 72,114
Special Mention [Member]
Loans designated as criticized or classified	31,242	28,655
Substandard [Member]
Loans designated as criticized or classified	41,315	43,405
Doubtful [Member]
Loans designated as criticized or classified	0	54
Loss [Member]
Loans designated as criticized or classified	0	0
Multi-family Residential Portfolio Segment [Member]
Loans designated as criticized or classified	11,521	10,484
Multi-family Residential Portfolio Segment [Member] | Special Mention [Member]
Loans designated as criticized or classified	9,333	7,133
Multi-family Residential Portfolio Segment [Member] | Substandard [Member]
Loans designated as criticized or classified	2,188	3,351
Multi-family Residential Portfolio Segment [Member] | Doubtful [Member]
Loans designated as criticized or classified	0	0
Multi-family Residential Portfolio Segment [Member] | Loss [Member]
Loans designated as criticized or classified	0	0
Commercial Real Estate Portfolio Segment [Member]
Loans designated as criticized or classified	5,782	7,430
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]
Loans designated as criticized or classified	1,015	2,941
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Loans designated as criticized or classified	4,767	4,489
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member]
Loans designated as criticized or classified	0	0
Commercial Real Estate Portfolio Segment [Member] | Loss [Member]
Loans designated as criticized or classified	0	0
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member]
Loans designated as criticized or classified	6,251	11,206
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Special Mention [Member]
Loans designated as criticized or classified	1,700	4,197
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Substandard [Member]
Loans designated as criticized or classified	4,551	7,009
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Doubtful [Member]
Loans designated as criticized or classified	0	0
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Loss [Member]
Loans designated as criticized or classified	0	0
One-To-Four Family - Residential Portfolio Segment [Member]
Loans designated as criticized or classified	10,418
One-To-Four Family - Residential Portfolio Segment [Member] | Special Mention [Member]
Loans designated as criticized or classified	915
One-To-Four Family - Residential Portfolio Segment [Member] | Substandard [Member]
Loans designated as criticized or classified	9,503
One-To-Four Family - Residential Portfolio Segment [Member] | Doubtful [Member]
Loans designated as criticized or classified	0
One-To-Four Family - Residential Portfolio Segment [Member] | Loss [Member]
Loans designated as criticized or classified	0
One-To-Four Family - Residential [Member]
Loans designated as criticized or classified		10,604
One-To-Four Family - Residential [Member] | Special Mention [Member]
Loans designated as criticized or classified		1,205
One-To-Four Family - Residential [Member] | Substandard [Member]
Loans designated as criticized or classified		9,399
One-To-Four Family - Residential [Member] | Doubtful [Member]
Loans designated as criticized or classified		0
One-To-Four Family - Residential [Member] | Loss [Member]
Loans designated as criticized or classified		0
Co-Operative Apartments Portfolio Segment [Member]
Loans designated as criticized or classified	0	0
Co-Operative Apartments Portfolio Segment [Member] | Special Mention [Member]
Loans designated as criticized or classified	0	0
Co-Operative Apartments Portfolio Segment [Member] | Substandard [Member]
Loans designated as criticized or classified	0	0
Co-Operative Apartments Portfolio Segment [Member] | Doubtful [Member]
Loans designated as criticized or classified	0	0
Co-Operative Apartments Portfolio Segment [Member] | Loss [Member]
Loans designated as criticized or classified	0	0
Construction Portfolio Segment [Member]
Loans designated as criticized or classified	1,178	0
Construction Portfolio Segment [Member] | Special Mention [Member]
Loans designated as criticized or classified	0	0
Construction Portfolio Segment [Member] | Substandard [Member]
Loans designated as criticized or classified	1,178	0
Construction Portfolio Segment [Member] | Doubtful [Member]
Loans designated as criticized or classified	0	0
Construction Portfolio Segment [Member] | Loss [Member]
Loans designated as criticized or classified	0	0
Small Business Administration Portfolio Segment [Member]
Loans designated as criticized or classified	800	976	[1]
Small Business Administration Portfolio Segment [Member] | Special Mention [Member]
Loans designated as criticized or classified	585	540	[1]
Small Business Administration Portfolio Segment [Member] | Substandard [Member]
Loans designated as criticized or classified	215	436	[1]
Small Business Administration Portfolio Segment [Member] | Doubtful [Member]
Loans designated as criticized or classified	0	0	[1]
Small Business Administration Portfolio Segment [Member] | Loss [Member]
Loans designated as criticized or classified	0	0	[1]
Taxi Medallion Portfolio Segment [Member]
Loans designated as criticized or classified	18,165	18,997
Taxi Medallion Portfolio Segment [Member] | Special Mention [Member]
Loans designated as criticized or classified	0	2,715
Taxi Medallion Portfolio Segment [Member] | Substandard [Member]
Loans designated as criticized or classified	18,165	16,228
Taxi Medallion Portfolio Segment [Member] | Doubtful [Member]
Loans designated as criticized or classified	0	54
Taxi Medallion Portfolio Segment [Member] | Loss [Member]
Loans designated as criticized or classified	0	0
Commercial Business and Other Portfolio Segment [Member]
Loans designated as criticized or classified	18,442	12,417
Commercial Business and Other Portfolio Segment [Member] | Special Mention [Member]
Loans designated as criticized or classified	17,694	9,924
Commercial Business and Other Portfolio Segment [Member] | Substandard [Member]
Loans designated as criticized or classified	748	2,493
Commercial Business and Other Portfolio Segment [Member] | Doubtful [Member]
Loans designated as criticized or classified	0	0
Commercial Business and Other Portfolio Segment [Member] | Loss [Member]
Loans designated as criticized or classified	$ 0	$ 0

[1] Balances shown are net of the portion guaranteed by the Small Business Administration totaling $1.5 million and $0.1 million at December 31, 2016 and 2015, respectively.