Allowance for Credit Losses on Loans - Summary of Performing and Nonperforming Loans by Class (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable Recorded Investment [Line Items]
Loans	$ 592,071	$ 497,889
SBA Paycheck Protection Program [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	184	531
Real Estate - Commercial [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	213,523	183,694
Other Real Estate Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	40,872	37,077
Real Estate 1 - 4 Family Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	12,481	6,613
Real Estate - Residential [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	144,438	109,443
Home Equity [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	60,600	58,186
Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	6,214	6,666
Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	590,970	497,490
Performing [Member] | SBA Paycheck Protection Program [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	184	531
Performing [Member] | Real Estate - Commercial [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	213,035	183,694
Performing [Member] | Other Real Estate Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	40,872	36,894
Performing [Member] | Real Estate 1 - 4 Family Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	12,481	6,613
Performing [Member] | Real Estate - Residential [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	144,160	109,326
Performing [Member] | Home Equity [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	60,419	58,158
Performing [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	6,214	6,666
Non-Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	1,101	399
Non-Performing [Member] | Real Estate - Commercial [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	488
Non-Performing [Member] | Other Real Estate Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		183
Non-Performing [Member] | Real Estate - Residential [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	278	117
Non-Performing [Member] | Home Equity [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	181	28
Commercial [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	102,178	85,917
Commercial [Member] | Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	102,024	85,846
Commercial [Member] | Non-Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	154	71
Consumer Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	11,581	9,762
Consumer Loans [Member] | Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	$ 11,581	$ 9,762