Note 3 - Loans and Allowance for Loan Losses - Activity in the Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Beginning balance	$ 21,535	$ 25,096	$ 31,776
Charge-off's	(1,159)	(3,845)	(2,442)
Recoveries	1,853	1,240	1,783
Provision (benefit)	0	(956)	(6,021)
Ending balance	22,229	21,535	25,096
Allowance for credit losses:
Beginning balance	21,535	25,096	31,776
Charge-off's	(1,159)	(3,845)	(2,442)
Recoveries	1,853	1,240	1,783
Provision (benefit)	0	(956)	(6,021)
Ending balance	22,229	21,535	25,096
Multi-family Residential Portfolio Segment [Member]
Beginning balance	6,718	8,827	12,084
Charge-off's	(161)	(474)	(1,161)
Recoveries	339	269	150
Provision (benefit)	(973)	(1,904)	(2,246)
Ending balance	5,923	6,718	8,827
Allowance for credit losses:
Beginning balance	6,718	8,827	12,084
Charge-off's	(161)	(474)	(1,161)
Recoveries	339	269	150
Provision (benefit)	(973)	(1,904)	(2,246)
Ending balance	5,923	6,718	8,827
Commercial Real Estate Portfolio Segment [Member]
Beginning balance	4,239	4,202	4,959
Charge-off's	0	(32)	(325)
Recoveries	11	168	481
Provision (benefit)	237	(99)	(913)
Ending balance	4,487	4,239	4,202
Allowance for credit losses:
Beginning balance	4,239	4,202	4,959
Charge-off's	0	(32)	(325)
Recoveries	11	168	481
Provision (benefit)	237	(99)	(913)
Ending balance	4,487	4,239	4,202
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member]
Beginning balance	4,227	5,840	6,328
Charge-off's	(144)	(592)	(423)
Recoveries	777	76	608
Provision (benefit)	(1,957)	(1,097)	(673)
Ending balance	2,903	4,227	5,840
Allowance for credit losses:
Beginning balance	4,227	5,840	6,328
Charge-off's	(144)	(592)	(423)
Recoveries	777	76	608
Provision (benefit)	(1,957)	(1,097)	(673)
Ending balance	2,903	4,227	5,840
One-To-Four Family - Residential Portfolio Segment [Member]
Beginning balance	1,227	1,690	2,079
Charge-off's	(114)	(342)	(103)
Recoveries	366	375	269
Provision (benefit)	(464)	(496)	(555)
Ending balance	1,015	1,227	1,690
Allowance for credit losses:
Beginning balance	1,227	1,690	2,079
Charge-off's	(114)	(342)	(103)
Recoveries	366	375	269
Provision (benefit)	(464)	(496)	(555)
Ending balance	1,015	1,227	1,690
Co-Operative Apartments Portfolio Segment [Member]
Beginning balance	0	0	104
Charge-off's	0	0	0
Recoveries	0	0	7
Provision (benefit)	0	0	(111)
Ending balance	0	0	0
Allowance for credit losses:
Beginning balance	0	0	104
Charge-off's	0	0	0
Recoveries	0	0	7
Provision (benefit)	0	0	(111)
Ending balance	0	0	0
Construction Portfolio Segment [Member]
Beginning balance	50	42	444
Charge-off's	0	0	0
Recoveries	0	0	0
Provision (benefit)	42	8	(402)
Ending balance	92	50	42
Allowance for credit losses:
Beginning balance	50	42	444
Charge-off's	0	0	0
Recoveries	0	0	0
Provision (benefit)	42	8	(402)
Ending balance	92	50	42
Small Business Administration Portfolio Segment [Member]
Beginning balance	262	279	458
Charge-off's	(529)	(34)	(49)
Recoveries	99	40	92
Provision (benefit)	649	(23)	(222)
Ending balance	481	262	279
Allowance for credit losses:
Beginning balance	262	279	458
Charge-off's	(529)	(34)	(49)
Recoveries	99	40	92
Provision (benefit)	649	(23)	(222)
Ending balance	481	262	279
Taxi Medallion Portfolio Segment [Member]
Beginning balance	343	11	0
Charge-off's	(142)	0	0
Recoveries	0	0	0
Provision (benefit)	2,042	332	11
Ending balance	2,243	343	11
Allowance for credit losses:
Beginning balance	343	11	0
Charge-off's	(142)	0	0
Recoveries	0	0	0
Provision (benefit)	2,042	332	11
Ending balance	2,243	343	11
Commercial Business and Other Portfolio Segment [Member]
Beginning balance	4,469	4,205	5,320
Charge-off's	(69)	(2,371)	(381)
Recoveries	261	312	176
Provision (benefit)	(169)	2,323	(910)
Ending balance	4,492	4,469	4,205
Allowance for credit losses:
Beginning balance	4,469	4,205	5,320
Charge-off's	(69)	(2,371)	(381)
Recoveries	261	312	176
Provision (benefit)	(169)	2,323	(910)
Ending balance	4,492	4,469	$ 4,205
Unallocated Financing Receivables [Member]
Beginning balance	0
Charge-off's	0
Recoveries	0
Provision (benefit)	593
Ending balance	593	0
Allowance for credit losses:
Beginning balance	0
Charge-off's	0
Recoveries	0
Provision (benefit)	593
Ending balance	$ 593	$ 0