Loans - Summary of Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 647,626	$ 626,958
Allowance for credit/loan losses	(6,307)	(6,838)	$ (7,305)	$ (7,618)
Deferred loan costs, net	147	213
Net Total Loans	641,466	620,333
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		129,343
Allowance for credit/loan losses			(1,169)	(1,240)
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	137,369
Allowance for credit/loan losses	(1,821)	(1,110)
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	167,878	231,785
Allowance for credit/loan losses	(2,236)	(2,760)	(2,550)	(2,838)
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		194,125
Allowance for credit/loan losses			(1,039)	(992)
Commercial Lessors of Buildings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	81,917
Allowance for credit/loan losses	(965)
Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	43,498
Allowance for credit/loan losses	(271)	(803)
Consumer Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	157,316
Allowance for credit/loan losses	(693)	(1,268)
Home Equity Line of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	43,323
Allowance for credit/loan losses	(186)
Consumer Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	9,951
Allowance for credit/loan losses	(47)	(233)
Consumer Indirect [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	6,374
Allowance for credit/loan losses	$ (88)
Construction & Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		55,318
Allowance for credit/loan losses			(1,534)	(1,380)
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		$ 16,387
Allowance for credit/loan losses			$ (382)	$ (421)