LOANS AND SERVICING - Internal Credit Assessment (Details) $ in Thousands	Dec. 31, 2016 USD ($) grade	Dec. 31, 2015 USD ($)
Loans by risk rating
Loans receivable	$ 279,492	$ 256,014
Internal Loan Rating System
Number of grades in internal loan rating system | grade	9
Not formally rated
Loans by risk rating
Loans receivable	$ 104,305	103,198
Pass
Loans by risk rating
Loans receivable	$ 172,297	150,128
Pass | Minimum
Internal Loan Rating System
Grade assigned in internal loan rating system | grade	1
Pass | Maximum
Internal Loan Rating System
Grade assigned in internal loan rating system | grade	5
Special mention
Loans by risk rating
Loans receivable		826
Internal Loan Rating System
Grade assigned in internal loan rating system | grade	6
Substandard
Loans by risk rating
Loans receivable	$ 2,890	1,862
Internal Loan Rating System
Grade assigned in internal loan rating system | grade	7
Doubtful
Internal Loan Rating System
Grade assigned in internal loan rating system | grade	8
Loss
Internal Loan Rating System
Grade assigned in internal loan rating system | grade	9
Residential loans:
Loans by risk rating
Loans receivable	$ 106,069	104,735
One- to four- family, residential loans
Loans by risk rating
Loans receivable	90,190	86,472
One- to four- family, residential loans | Not formally rated
Loans by risk rating
Loans receivable	88,522	84,778
One- to four- family, residential loans | Substandard
Loans by risk rating
Loans receivable	1,668	1,694
Home equity loans and lines of credit
Loans by risk rating
Loans receivable	15,879	18,263
Home equity loans and lines of credit | Not formally rated
Loans by risk rating
Loans receivable	15,601	18,183
Home equity loans and lines of credit | Substandard
Loans by risk rating
Loans receivable	278	80
Commercial loans:
Loans by risk rating
Loans receivable	148,087	130,664
One-to-four family investment property
Loans by risk rating
Loans receivable	13,081	15,255
One-to-four family investment property | Pass
Loans by risk rating
Loans receivable	12,996	15,167
One-to-four family investment property | Substandard
Loans by risk rating
Loans receivable	85	88
Multi-family real estate
Loans by risk rating
Loans receivable	30,748	30,709
Multi-family real estate | Pass
Loans by risk rating
Loans receivable	30,748	30,709
Commercial real estate
Loans by risk rating
Loans receivable	83,583	67,152
Commercial real estate | Pass
Loans by risk rating
Loans receivable	82,873	66,420
Commercial real estate | Special mention
Loans by risk rating
Loans receivable		732
Commercial real estate | Substandard
Loans by risk rating
Loans receivable	710
Commercial business loan
Loans by risk rating
Loans receivable	20,675	17,548
Commercial business loan | Pass
Loans by risk rating
Loans receivable	20,526	17,454
Commercial business loan | Special mention
Loans by risk rating
Loans receivable		94
Commercial business loan | Substandard
Loans by risk rating
Loans receivable	149
Construction loans
Loans by risk rating
Loans receivable	25,154	20,378
One-to-four family, construction loans
Loans by risk rating
Loans receivable	12,599	12,967
One-to-four family, construction loans | Pass
Loans by risk rating
Loans receivable	12,599	12,967
Multi-family
Loans by risk rating
Loans receivable	5,725	1,486
Multi-family | Pass
Loans by risk rating
Loans receivable	5,725	1,486
Non-residential
Loans by risk rating
Loans receivable	6,830	5,925
Non-residential | Pass
Loans by risk rating
Loans receivable	6,830	5,925
Consumer
Loans by risk rating
Loans receivable	182	237
Consumer | Not formally rated
Loans by risk rating
Loans receivable	$ 182	$ 237