Note 5 - Troubled Debt Restructurings That are Performing According to Their Restructured Terms (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016 USD ($)	Mar. 31, 2015	Dec. 31, 2015 USD ($)
Multi-Family Residential [Member] | Performing Financial Instruments [Member]
Number of contracts	9		9
Recorded investment	$ 2,611		$ 2,626
Commercial Real Estate Loans [Member] | Performing Financial Instruments [Member]
Number of contracts	3		3
Recorded investment	$ 2,358		$ 2,371
One-To-Four Family - Mixed Used Property [Member] | Performing Financial Instruments [Member]
Number of contracts	6		6
Recorded investment	$ 2,042		$ 2,052
One-To-Four Family - Residential [Member] | Performing Financial Instruments [Member]
Number of contracts	1		1
Recorded investment	$ 341		$ 343
Small Business Administration Portfolio Segment [Member] | Performing Financial Instruments [Member]
Number of contracts	1		1
Recorded investment	$ 32		$ 34
Commercial Business and Other [Member] | Performing Financial Instruments [Member]
Number of contracts	4		4
Recorded investment	$ 2,038		$ 2,083
Performing Financial Instruments [Member]
Number of contracts	24		24
Recorded investment	$ 9,422		$ 9,509
Number of contracts		1