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Loans Past Due Analysis (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	$ 464,711	$ 475,193
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	617	2,106
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	94	0
Financing Receivable, Recorded Investment, Total Still Accruing	465,422	477,299
Financing Receivable, Recorded Investment, Nonaccrual Status	174	178
Loans and Leases Receivable, Gross, Carrying Amount	465,596	477,477	$ 460,960
Commercial and Industrial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	52,235	63,367
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	53	100
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	52,288	63,467
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	52,288	63,467	52,430
Construction And Land Development Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	41,150	39,997
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	449	225
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	41,599	40,222
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	41,599	40,222	45,109
Commercial Real Estate Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	60,977	56,413
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	0	0
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	60,977	56,413
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	60,977	56,413
Commercial Real Estate Multifamily [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	42,766	40,455
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	0	0
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	42,766	40,455
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	42,766	40,455
Commercial Real Estate Other Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	163,603	165,028
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	0	0
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	163,603	165,028
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	163,603	165,028
Commercial Real Estate Loans, Total [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	267,346	261,896
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	0	0
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	267,346	261,896
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	267,346	261,896	250,150
Residential Real Estate Consumer Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	47,986	54,446
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	94	1,599
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	94	0
Financing Receivable, Recorded Investment, Total Still Accruing	48,174	56,045
Financing Receivable, Recorded Investment, Nonaccrual Status	174	178
Loans and Leases Receivable, Gross, Carrying Amount	48,348	56,223
Residential Real Estate Investment Property Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	46,867	46,233
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	0	141
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	46,867	46,374
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	46,867	46,374
Residential Real Estate Loans, Total [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	94,853	100,679
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	94	1,740
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	94	0
Financing Receivable, Recorded Investment, Total Still Accruing	95,041	102,419
Financing Receivable, Recorded Investment, Nonaccrual Status	174	178
Loans and Leases Receivable, Gross, Carrying Amount	95,215	102,597	103,329
Consumer Installment and Revolving Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	9,127	9,254
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	21	41
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	9,148	9,295
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	$ 9,148	$ 9,295	$ 9,942

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