Loans and Allowance for Credit Losses - Loans - Non-accrual loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable Nonaccrual Status
Balance	$ 338	$ 4,512
Transfer into non-accrual	751	1,283
Loans paid down/payoffs	(230)	(4,218)
Loans returned to accrual status	(29)	(996)
Loans charged off	(342)	(243)
Balance	488	338
Real Estate Loan
Financing Receivable Nonaccrual Status
Balance	123
Balance	104	123
Commercial and Industrial
Financing Receivable Nonaccrual Status
Balance	71
Balance	299	71
Consumer Loans
Financing Receivable Nonaccrual Status
Balance	144
Balance	85	144
Single-family Residential | Real Estate Loan
Financing Receivable Nonaccrual Status
Balance	123	270
Transfer into non-accrual	31
Loans paid down/payoffs	(50)	(147)
Balance	104	123
Commercial | Real Estate Loan
Financing Receivable Nonaccrual Status
Balance		4,029
Transfer into non-accrual		920
Loans paid down/payoffs		(3,987)
Loans returned to accrual status		(962)
Commercial and Industrial | Commercial and Industrial
Financing Receivable Nonaccrual Status
Transfer into non-accrual	502
Loans paid down/payoffs	(3)
Loans charged off	(200)
Balance	299
SBA Guaranty | Commercial and Industrial
Financing Receivable Nonaccrual Status
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
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
Balance	144	179
Transfer into non-accrual	207	291
Loans paid down/payoffs	(105)	(83)
Loans returned to accrual status	(29)
Loans charged off	(132)	(243)
Balance	$ 85	$ 144