Note 5 - Loans - Loans Designated as Criticized or Classified (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Loans designated as criticized or classified	$ 56,667	$ 62,684
Special Mention [Member]
Loans designated as criticized or classified	8,992	28,727
Substandard [Member]
Loans designated as criticized or classified	47,675	33,957
Doubtful [Member]
Loans designated as criticized or classified
Loss [Member]
Loans designated as criticized or classified
Multi-family Residential Portfolio Segment [Member]
Loans designated as criticized or classified	6,187	11,182
Multi-family Residential Portfolio Segment [Member] | Special Mention [Member]
Loans designated as criticized or classified	3,092	6,389
Multi-family Residential Portfolio Segment [Member] | Substandard [Member]
Loans designated as criticized or classified	3,095	4,793
Multi-family Residential Portfolio Segment [Member] | Doubtful [Member]
Loans designated as criticized or classified
Multi-family Residential Portfolio Segment [Member] | Loss [Member]
Loans designated as criticized or classified
Commercial Real Estate Portfolio Segment [Member]
Loans designated as criticized or classified	7,175	10,891
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]
Loans designated as criticized or classified	2,969	2,020
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Loans designated as criticized or classified	4,206	8,871
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member]
Loans designated as criticized or classified
Commercial Real Estate Portfolio Segment [Member] | Loss [Member]
Loans designated as criticized or classified
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member]
Loans designated as criticized or classified	3,182	6,526
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Special Mention [Member]
Loans designated as criticized or classified	1,215	2,835
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Substandard [Member]
Loans designated as criticized or classified	1,967	3,691
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Doubtful [Member]
Loans designated as criticized or classified
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Loss [Member]
Loans designated as criticized or classified
One-To-Four Family - Residential Portfolio Segment [Member]
Loans designated as criticized or classified	7,485
One-To-Four Family - Residential Portfolio Segment [Member] | Special Mention [Member]
Loans designated as criticized or classified	480
One-To-Four Family - Residential Portfolio Segment [Member] | Substandard [Member]
Loans designated as criticized or classified	7,005
One-To-Four Family - Residential Portfolio Segment [Member] | Doubtful [Member]
Loans designated as criticized or classified
One-To-Four Family - Residential Portfolio Segment [Member] | Loss [Member]
Loans designated as criticized or classified
One-To-Four Family - Residential [Member]
Loans designated as criticized or classified		11,191
One-To-Four Family - Residential [Member] | Special Mention [Member]
Loans designated as criticized or classified		2,076
One-To-Four Family - Residential [Member] | Substandard [Member]
Loans designated as criticized or classified		9,115
One-To-Four Family - Residential [Member] | Doubtful [Member]
Loans designated as criticized or classified
One-To-Four Family - Residential [Member] | Loss [Member]
Loans designated as criticized or classified
Small Business Administration Portfolio Segment [Member]
Loans designated as criticized or classified	761	656	[1]
Small Business Administration Portfolio Segment [Member] | Special Mention [Member]
Loans designated as criticized or classified	487	548	[1]
Small Business Administration Portfolio Segment [Member] | Substandard [Member]
Loans designated as criticized or classified	274	108	[1]
Small Business Administration Portfolio Segment [Member] | Doubtful [Member]
Loans designated as criticized or classified			[1]
Small Business Administration Portfolio Segment [Member] | Loss [Member]
Loans designated as criticized or classified			[1]
Taxi Medallion Portfolio Segment [Member]
Loans designated as criticized or classified	6,078	6,834
Taxi Medallion Portfolio Segment [Member] | Special Mention [Member]
Loans designated as criticized or classified
Taxi Medallion Portfolio Segment [Member] | Substandard [Member]
Loans designated as criticized or classified	6,078	6,834
Taxi Medallion Portfolio Segment [Member] | Doubtful [Member]
Loans designated as criticized or classified
Taxi Medallion Portfolio Segment [Member] | Loss [Member]
Loans designated as criticized or classified
Commercial Business and Other Portfolio Segment [Member]
Loans designated as criticized or classified	25,799	15,404
Commercial Business and Other Portfolio Segment [Member] | Special Mention [Member]
Loans designated as criticized or classified	749	14,859
Commercial Business and Other Portfolio Segment [Member] | Substandard [Member]
Loans designated as criticized or classified	25,050	545
Commercial Business and Other Portfolio Segment [Member] | Doubtful [Member]
Loans designated as criticized or classified
Commercial Business and Other Portfolio Segment [Member] | Loss [Member]
Loans designated as criticized or classified

[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.