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Loan Credit Quality Analysis (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	$ 433,987	$ 450,911
Financing Receivable, Recorded Investment, Special Mention	5,877	5,913
Financing Receivable Recorded Investment, Substandard Accruing	4,302	4,371
Financing Receivable, Recorded Investment, Nonaccrual Status	116	187
Loans and Leases Receivable, Gross, Carrying Amount	444,282	461,382	$ 473,173
Commercial and Industrial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	53,875	54,340
Financing Receivable, Recorded Investment, Special Mention	2,326	2,176
Financing Receivable Recorded Investment, Substandard Accruing	246	266
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	56,447	56,782	50,898
Construction And Land Development Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	31,392	31,798
Financing Receivable, Recorded Investment, Special Mention	0	0
Financing Receivable Recorded Investment, Substandard Accruing	910	1,043
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	32,302	32,841	44,931
Commercial Real Estate Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	47,646	47,865
Financing Receivable, Recorded Investment, Special Mention	910	917
Financing Receivable Recorded Investment, Substandard Accruing	149	78
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	48,705	48,860
Commercial Real Estate Hotel Motel [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	43,249	43,719
Financing Receivable, Recorded Investment, Special Mention	0	0
Financing Receivable Recorded Investment, Substandard Accruing	0	0
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	43,249	43,719
Commercial Real Estate Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	33,190	44,839
Financing Receivable, Recorded Investment, Special Mention	0	0
Financing Receivable Recorded Investment, Substandard Accruing	0	0
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	33,190	44,839
Commercial Real Estate Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	130,088	132,030
Financing Receivable, Recorded Investment, Special Mention	846	849
Financing Receivable Recorded Investment, Substandard Accruing	21	21
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	130,955	132,900
Commercial Real Estate Loans, Total [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	254,173	268,453
Financing Receivable, Recorded Investment, Special Mention	1,756	1,766
Financing Receivable Recorded Investment, Substandard Accruing	170	99
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	256,099	270,318	265,149
Residential Real Estate Consumer Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	41,666	45,247
Financing Receivable, Recorded Investment, Special Mention	1,223	962
Financing Receivable Recorded Investment, Substandard Accruing	2,547	2,527
Financing Receivable, Recorded Investment, Nonaccrual Status	112	187
Loans and Leases Receivable, Gross, Carrying Amount	45,548	48,923
Residential Real Estate Investment Property Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	44,582	42,331
Financing Receivable, Recorded Investment, Special Mention	514	949
Financing Receivable Recorded Investment, Substandard Accruing	366	372
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	45,462	43,652
Residential Real Estate Loans, Total [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	86,248	87,578
Financing Receivable, Recorded Investment, Special Mention	1,737	1,911
Financing Receivable Recorded Investment, Substandard Accruing	2,913	2,899
Financing Receivable, Recorded Investment, Nonaccrual Status	112	187
Loans and Leases Receivable, Gross, Carrying Amount	91,010	92,575	103,631
Consumer Installment and Revolving Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	8,299	8,742
Financing Receivable, Recorded Investment, Special Mention	58	60
Financing Receivable Recorded Investment, Substandard Accruing	63	64
Financing Receivable, Recorded Investment, Nonaccrual Status	4	0
Loans and Leases Receivable, Gross, Carrying Amount	$ 8,424	$ 8,866	$ 8,564

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