Note 3 - Loans and Allowance for Loan Losses - Loans Designated as Criticized or Classified (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Loans designated as criticized or classified	$ 72,114	$ 49,878
Special Mention [Member]
Loans designated as criticized or classified	28,655	10,935
Substandard [Member]
Loans designated as criticized or classified	43,405	38,943
Doubtful [Member]
Loans designated as criticized or classified	54	0
Loss [Member]
Loans designated as criticized or classified	0	0
Multi-family Residential Portfolio Segment [Member]
Loans designated as criticized or classified	10,484	9,782
Multi-family Residential Portfolio Segment [Member] | Special Mention [Member]
Loans designated as criticized or classified	7,133	4,361
Multi-family Residential Portfolio Segment [Member] | Substandard [Member]
Loans designated as criticized or classified	3,351	5,421
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	7,430	5,633
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]
Loans designated as criticized or classified	2,941	1,821
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Loans designated as criticized or classified	4,489	3,812
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	11,206	14,077
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Special Mention [Member]
Loans designated as criticized or classified	4,197	3,087
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Substandard [Member]
Loans designated as criticized or classified	7,009	10,990
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	10,604
One-To-Four Family - Residential Portfolio Segment [Member] | Special Mention [Member]
Loans designated as criticized or classified	1,205
One-To-Four Family - Residential Portfolio Segment [Member] | Substandard [Member]
Loans designated as criticized or classified	9,399
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		13,692
One-To-Four Family - Residential [Member] | Special Mention [Member]
Loans designated as criticized or classified		1,437
One-To-Four Family - Residential [Member] | Substandard [Member]
Loans designated as criticized or classified		12,255
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	0	1,000
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	0	1,000
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	976	453	[1]
Small Business Administration Portfolio Segment [Member] | Special Mention [Member]
Loans designated as criticized or classified	540	229	[1]
Small Business Administration Portfolio Segment [Member] | Substandard [Member]
Loans designated as criticized or classified	436	224	[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	18,997	2,118
Taxi Medallion Portfolio Segment [Member] | Special Mention [Member]
Loans designated as criticized or classified	2,715	0
Taxi Medallion Portfolio Segment [Member] | Substandard [Member]
Loans designated as criticized or classified	16,228	2,118
Taxi Medallion Portfolio Segment [Member] | Doubtful [Member]
Loans designated as criticized or classified	54	0
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	12,417
Commercial Business and Other Portfolio Segment [Member] | Special Mention [Member]
Loans designated as criticized or classified	9,924
Commercial Business and Other Portfolio Segment [Member] | Substandard [Member]
Loans designated as criticized or classified	2,493
Commercial Business and Other Portfolio Segment [Member] | Doubtful [Member]
Loans designated as criticized or classified	0
Commercial Business and Other Portfolio Segment [Member] | Loss [Member]
Loans designated as criticized or classified	$ 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.