LOANS RECEIVABLE - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 2,276	$ 3,022
(Reversal of) provision for loan losses	(260)	(286)
Charge-offs	(101)	(132)
Recoveries	65	45
Ending balance	1,980	2,649
One- to four-family residential
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	1,573	1,910
(Reversal of) provision for loan losses	(173)	(199)
Charge-offs	(69)	(117)
Recoveries	55	35
Ending balance	1,386	1,629
Commercial real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	370	744
(Reversal of) provision for loan losses	(78)	(31)
Ending balance	292	713
Construction & land
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	55	82
(Reversal of) provision for loan losses	(14)	(27)
Ending balance	41	55
Multi-family residential
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	73	68
(Reversal of) provision for loan losses	(29)	(7)
Ending balance	44	61
Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	68	78
(Reversal of) provision for loan losses	(3)	(12)
Charge-offs	(11)	(15)
Recoveries	3	10
Ending balance	57	61
Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	137	101
(Reversal of) provision for loan losses	37	2
Charge-offs	(21)
Recoveries	7
Ending balance	$ 160	103
Unallocated
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		39
(Reversal of) provision for loan losses		(12)
Ending balance		$ 27