LOANS AND SERVICING - Summary of loans (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Summary of loans:
Loans receivable	$ 256,014	$ 233,143
Other items:
Net deferred loan costs	377	379
Allowance for loan losses	(2,408)	(2,229)	$ (2,396)
Total loans, net	253,983	231,293
Residential loans:
Summary of loans:
Loans receivable	104,735	100,698
One- to four- family, residential loans
Summary of loans:
Loans receivable	86,472	84,199
Other items:
Allowance for loan losses	(197)	(273)	(284)
Home equity loans and lines of credit
Summary of loans:
Loans receivable	18,263	16,499
Other items:
Allowance for loan losses	(276)	(249)	(274)
Commercial loans:
Summary of loans:
Loans receivable	130,664	103,430
One-to-four family investment property
Summary of loans:
Loans receivable	15,255	8,345
Other items:
Allowance for loan losses	(90)	(46)	(61)
Multi-family real estate
Summary of loans:
Loans receivable	30,709	15,020
Other items:
Allowance for loan losses	(233)	(113)	(108)
Commercial real estate
Summary of loans:
Loans receivable	67,152	62,227
Other items:
Allowance for loan losses	(1,021)	(943)	(1,056)
Commercial business loan
Summary of loans:
Loans receivable	17,548	17,838
Other items:
Allowance for loan losses	(305)	(311)	(291)
Construction loans:
Summary of loans:
Loans receivable	20,378	28,726
One-to-four family, construction loans
Summary of loans:
Loans receivable	12,967	13,056
Other items:
Allowance for loan losses	(113)	(117)	(133)
Multi-family
Summary of loans:
Loans receivable	1,486	10,842
Other items:
Allowance for loan losses	(12)	(97)	(66)
Non-residential
Summary of loans:
Loans receivable	5,925	4,828
Other items:
Allowance for loan losses	(91)	(77)	(63)
Consumer
Summary of loans:
Loans receivable	237	289
Other items:
Allowance for loan losses	$ (2)	$ (3)	$ (15)