Note 4 - Loans Held for Sale - Delinquent and Non-performing Loans Sold During the Period Indicated (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Loans sold	26	23	34
Proceeds	$ 7,965	$ 8,986	$ 15,857
Net (charge-offs) recoveries	48	134	357
Net gain	$ 265	$ 69	$ 67
Multi-family Residential Portfolio Segment [Member]
Loans sold	9	9	12
Proceeds	$ 2,680	$ 3,540	$ 5,759
Net (charge-offs) recoveries	1	134	(80)
Net gain	$ 3	$ (1)	$ 9
Commercial Real Estate Portfolio Segment [Member]
Loans sold	2	4	6
Proceeds	$ 192	$ 2,615	$ 4,635
Net (charge-offs) recoveries	0	0	295
Net gain	$ 0	$ 13	$ 8
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member]
Loans sold	15	10	14
Proceeds	$ 5,093	$ 2,831	$ 5,399
Net (charge-offs) recoveries	47	0	122
Net gain	$ 262	$ 57	$ 50
Commercial Business and Other Portfolio Segment [Member]
Loans sold			2
Proceeds			$ 64
Net (charge-offs) recoveries			20
Net gain