Loans - Summary of Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 701,481	$ 626,958
Allowance for credit/loan losses	(6,607)	(6,838)	$ (7,618)
Deferred loan fees/costs, net	(77)	213
Net loans	694,797	620,333
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	152,125
Allowance for credit/loan losses	(1,737)	(1,110)
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		129,343
Allowance for credit/loan losses		(1,110)	(1,240)
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	190,702	231,785
Allowance for credit/loan losses	(1,637)	(2,760)	(2,838)
Commercial Lessors of Buildings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	82,687
Allowance for credit/loan losses	(1,200)
Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	49,214
Allowance for credit/loan losses	(333)	(803)
Consumer Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	166,891
Allowance for credit/loan losses	(1,107)	(1,268)
Home Equity Line of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	43,269
Allowance for credit/loan losses	(288)
Consumer Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	10,636
Allowance for credit/loan losses	(76)	(233)
Consumer Indirect [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	5,957
Allowance for credit/loan losses	$ (229)
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		194,125
Allowance for credit/loan losses		(1,268)	(992)
Construction & Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		55,318
Allowance for credit/loan losses		(803)	(1,380)
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		16,387
Allowance for credit/loan losses		$ (233)	$ (421)