LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES - Non-accrual loans (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	$ 338	$ 4,512
Transfer into non-accrual	193	1,196
Loans paid down/payoffs	(191)	(2,088)
Loans returned to accrual status	(29)	(650)
Loans charged off	(128)	(189)
Balance	183	2,781
Real Estate Loan
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	123
Balance	108
Commercial and Industrial
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	71
Consumer Loans
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	144
Balance	75
Single-family Residential | Real Estate Loan
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	123	270
Transfer into non-accrual	31
Loans paid down/payoffs	(46)	(138)
Balance	108	132
Commercial | Real Estate Loan
Financing Receivable Nonaccrual Status [Roll Forward]
Balance		4,029
Transfer into non-accrual		920
Loans paid down/payoffs		(1,881)
Loans returned to accrual status		(616)
Balance		2,452
SBA Guaranty | Commercial and Industrial
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	71
Transfer into non-accrual		71
Loans paid down/payoffs	(61)
Loans charged off	(10)
Balance		71
Consumer | Consumer Loans
Financing Receivable Nonaccrual Status [Roll Forward]
Balance		34
Transfer into non-accrual	11	1
Loans paid down/payoffs	(11)	(1)
Loans returned to accrual status		(34)
Automobile | Consumer Loans
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	144	179
Transfer into non-accrual	151	204
Loans paid down/payoffs	(73)	(68)
Loans returned to accrual status	(29)
Loans charged off	(118)	(189)
Balance	$ 75	$ 126