Loans - Schedule of Aging of Accruing Past Due and Nonaccrual Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	$ 701,481	$ 626,958
Nonaccrual	396	256
Total Past Due and Nonaccrual		824
Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	700,356	626,134
30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	528	300
60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	597	268
Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,125
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans		129,343
Total Past Due and Nonaccrual		73
Commercial [Member] | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans		129,270
Commercial [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans		70
Commercial [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans		3
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	152,125
Nonaccrual	59
Commercial and Industrial [Member] | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	151,964
Commercial and Industrial [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	111
Commercial and Industrial [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	50
Commercial and Industrial [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	161
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	190,702	231,785
Nonaccrual	62	92
Total Past Due and Nonaccrual		92
Commercial Real Estate [Member] | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	190,702	231,693
Commercial Lessors of Buildings [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	82,687
Nonaccrual	15
Commercial Lessors of Buildings [Member] | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	82,687
Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	49,214
Construction [Member] | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	49,214
Consumer Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	166,891
Nonaccrual	172
Consumer Mortgage [Member] | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	166,411
Consumer Mortgage [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	307
Consumer Mortgage [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	173
Consumer Mortgage [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	480
Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans		194,125
Nonaccrual		99
Total Past Due and Nonaccrual		331
Residential Real Estate [Member] | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans		193,794
Residential Real Estate [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans		95
Residential Real Estate [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans		137
Home Equity Line of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	43,269
Home Equity Line of Credit [Member] | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	42,955
Home Equity Line of Credit [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	33
Home Equity Line of Credit [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	281
Home Equity Line of Credit [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	314
Consumer Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	10,636
Nonaccrual	49
Consumer Installment [Member] | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	10,602
Consumer Installment [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	25
Consumer Installment [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	9
Consumer Installment [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	34
Consumer Indirect [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	5,957
Nonaccrual	39
Consumer Indirect [Member] | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	5,821
Consumer Indirect [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	52
Consumer Indirect [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	84
Consumer Indirect [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	$ 136
Construction & Land Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans		55,318
Total Past Due and Nonaccrual		32
Construction & Land Development [Member] | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans		55,286
Construction & Land Development [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans		32
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans		16,387
Nonaccrual		65
Total Past Due and Nonaccrual		296
Consumer [Member] | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans		16,091
Consumer [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans		103
Consumer [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans		$ 128