Loans and Allowance for Credit Losses - Schedule of Allowance for Credit Losses and Recorded Investment in Loans (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Allowance for credit losses:
Balance, beginning of period	$ 3,918	$ 2,052	$ 2,052
Impact of adopting ASC 326	3,870	4,452	3,918
Losses charged off	(57)	(29)
Recoveries	9	10
Balance, end of period	3,870	4,452	3,918
Allocation:
Ending balance: individually evaluated for credit losses	75
Ending balance: collectively evaluated for credit losses	3,795	4,452	3,918
Loans:
Ending balance: individually evaluated for impairment	384	23
Ending balance: collectively evaluated for impairment	479,923	463,665
Ending balance: individually evaluated for impairment			326
Ending balance: collectively evaluated for impairment			481,910
ASU No. 2016-13 | Adoption Impact
Allowance for credit losses:
Impact of adopting ASC 326		2,419
Balance, end of period		2,419
Commercial and Industrial
Allowance for credit losses:
Balance, beginning of period	573	215	215
Provision for (reversal of) credit loss expense	15	15
Impact of adopting ASC 326	589	990	573
Recoveries	1	5
Balance, end of period	589	990	573
Allocation:
Ending balance: individually evaluated for credit losses	75
Ending balance: collectively evaluated for credit losses	514	990	573
Loans:
Ending balance: individually evaluated for impairment	141	14
Ending balance: collectively evaluated for impairment	90,086	88,506
Ending balance: collectively evaluated for impairment			91,294
Commercial and Industrial | ASU No. 2016-13 | Adoption Impact
Allowance for credit losses:
Impact of adopting ASC 326		755
Balance, end of period		755
Commercial Real Estate
Allowance for credit losses:
Balance, beginning of period	1,408	815	815
Provision for (reversal of) credit loss expense	(31)	(1)
Impact of adopting ASC 326	1,377	1,202	1,408
Balance, end of period	1,377	1,202	1,408
Allocation:
Ending balance: individually evaluated for credit losses			0
Ending balance: collectively evaluated for credit losses	1,377	1,202	1,408
Loans:
Ending balance: individually evaluated for impairment	8	9
Ending balance: collectively evaluated for impairment	288,878	275,433
Ending balance: individually evaluated for impairment			8
Ending balance: collectively evaluated for impairment			291,851
Commercial Real Estate | ASU No. 2016-13 | Adoption Impact
Allowance for credit losses:
Impact of adopting ASC 326		388
Balance, end of period		388
Residential
Allowance for credit losses:
Balance, beginning of period	1,843	816	816
Provision for (reversal of) credit loss expense	(60)	(39)
Impact of adopting ASC 326	1,783	2,156	1,843
Balance, end of period	1,783	2,156	1,843
Allocation:
Ending balance: collectively evaluated for credit losses	1,783	2,156	1,843
Loans:
Ending balance: individually evaluated for impairment	235
Ending balance: collectively evaluated for impairment	92,477	93,386
Ending balance: individually evaluated for impairment			318
Ending balance: collectively evaluated for impairment			93,046
Residential | ASU No. 2016-13 | Adoption Impact
Allowance for credit losses:
Impact of adopting ASC 326		1,379
Balance, end of period		1,379
Installment
Allowance for credit losses:
Balance, beginning of period	94	206	206
Provision for (reversal of) credit loss expense	76	25
Impact of adopting ASC 326	121	104	94
Losses charged off	(57)	(29)
Recoveries	8	5
Balance, end of period	121	104	94
Allocation:
Ending balance: collectively evaluated for credit losses	121	104	94
Loans:
Ending balance: collectively evaluated for impairment	8,482	6,340
Ending balance: collectively evaluated for impairment			6,719
Installment | ASU No. 2016-13 | Adoption Impact
Allowance for credit losses:
Impact of adopting ASC 326		(103)
Balance, end of period		$ (103)
Consumer
Allowance for credit losses:
Losses charged off	$ (57)		$ (138)