Note 5 - Loans - Activity in the Allowance for Loan Losses (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Beginning balance	$ 21,015,000	$ 20,542,000	$ 20,945,000	$ 20,351,000
Charge-off's	(1,114,000)	(416,000)	(2,252,000)	(501,000)
Recoveries	135,000	94,000	371,000	217,000
Provision (Benefit)	1,474,000	0	2,446,000	153,000
Ending balance	21,510,000	20,220,000	21,510,000	20,220,000
Multi-family Residential Portfolio Segment [Member]
Beginning balance	5,493,000	5,750,000	5,676,000	5,823,000
Charge-off's	(1,000)	(28,000)	(1,000)	(81,000)
Recoveries	11,000	0	24,000	2,000
Provision (Benefit)	3,000	(184,000)	(193,000)	(206,000)
Ending balance	5,506,000	5,538,000	5,506,000	5,538,000
Commercial Real Estate Portfolio Segment [Member]
Beginning balance	4,278,000	4,602,000	4,315,000	4,643,000
Charge-off's	0	0	0	0
Recoveries	7,000	0	7,000	0
Provision (Benefit)	(20,000)	124,000	(57,000)	83,000
Ending balance	4,265,000	4,726,000	4,265,000	4,726,000
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member]
Beginning balance	1,791,000	2,470,000	1,867,000	2,545,000
Charge-off's	0	0	(1,000)	0
Recoveries	2,000	79,000	88,000	79,000
Provision (Benefit)	(7,000)	(252,000)	(168,000)	(327,000)
Ending balance	1,786,000	2,297,000	1,786,000	2,297,000
One-To-Four Family - Residential Portfolio Segment [Member]
Beginning balance	731,000	1,041,000	749,000	1,082,000
Charge-off's	(113,000)	0	(113,000)	(1,000)
Recoveries	3,000	4,000	7,000	112,000
Provision (Benefit)	125,000	(42,000)	103,000	(190,000)
Ending balance	746,000	1,003,000	746,000	1,003,000
Construction Portfolio Segment [Member]
Beginning balance	351,000	191,000	329,000	68,000
Charge-off's	0	0	0	0
Recoveries	0	0	0	0
Provision (Benefit)	30,000	73,000	52,000	196,000
Ending balance	381,000	264,000	381,000	264,000
Small Business Administration Portfolio Segment [Member]
Beginning balance	409,000	675,000	418,000	669,000
Charge-off's	0	(27,000)	0	(52,000)
Recoveries	16,000	9,000	20,000	15,000
Provision (Benefit)	(43,000)	(108,000)	(56,000)	(83,000)
Ending balance	382,000	549,000	382,000	549,000
Taxi Medallion Portfolio Segment [Member]
Beginning balance	0	0	0	0
Charge-off's	0	(353,000)	0	(353,000)
Recoveries	50,000	0	134,000	0
Provision (Benefit)	(50,000)	353,000	(134,000)	353,000
Ending balance	0	0	0	0
Commercial Business and Other Portfolio Segment [Member]
Beginning balance	7,962,000	5,813,000	7,591,000	5,521,000
Charge-off's	(1,000,000)	(8,000)	(2,137,000)	(14,000)
Recoveries	46,000	2,000	91,000	9,000
Provision (Benefit)	1,436,000	25,000	2,899,000	316,000
Ending balance	$ 8,444,000	5,832,000	$ 8,444,000	5,832,000
Unallocated Financing Receivables [Member]
Beginning balance		0		0
Charge-off's		0		0
Recoveries		0		0
Provision (Benefit)		11,000		11,000
Ending balance		$ 11,000		$ 11,000