LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES - Loans - Non-accrual loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Financing Receivable Nonaccrual Status
Balance	$ 488	$ 338
Transfer into non-accrual	190	61
Loans paid down/payoffs	(202)	(148)
Loans charged off	(8)	(49)
Balance	468	202
Real Estate Loan
Financing Receivable Nonaccrual Status
Balance	104
Balance	100
Commercial and Industrial
Financing Receivable Nonaccrual Status
Balance	299
Balance	296
Consumer Loans
Financing Receivable Nonaccrual Status
Balance	85
Balance	72
Single-family Residential | Real Estate Loan
Financing Receivable Nonaccrual Status
Balance	104	123
Transfer into non-accrual	187
Loans paid down/payoffs	(191)	(41)
Balance	100	82
Commercial and Industrial | Commercial and Industrial
Financing Receivable Nonaccrual Status
Balance	299
Loans charged off	(3)
Balance	296
SBA Guaranty | Commercial and Industrial
Financing Receivable Nonaccrual Status
Balance		71
Loans paid down/payoffs		(61)
Loans charged off		(10)
Automobile | Consumer Loans
Financing Receivable Nonaccrual Status
Balance	85	144
Transfer into non-accrual	3	61
Loans paid down/payoffs	(11)	(46)
Loans charged off	(5)	(39)
Balance	$ 72	$ 120