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Loan Credit Quality Analysis (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	$ 454,287	$ 466,410
Financing Receivable, Recorded Investment, Special Mention	6,368	4,361
Financing Receivable Recorded Investment, Substandard Accruing	4,767	6,528
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 [Line Items]
Financing Receivable, Recorded Investment, Pass	49,369	61,568
Financing Receivable, Recorded Investment, Special Mention	2,419	1,377
Financing Receivable Recorded Investment, Substandard Accruing	500	522
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 [Line Items]
Financing Receivable, Recorded Investment, Pass	40,792	39,481
Financing Receivable, Recorded Investment, Special Mention	147	0
Financing Receivable Recorded Investment, Substandard Accruing	660	741
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 [Line Items]
Financing Receivable, Recorded Investment, Pass	59,825	55,942
Financing Receivable, Recorded Investment, Special Mention	1,072	154
Financing Receivable Recorded Investment, Substandard Accruing	80	317
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 [Line Items]
Financing Receivable, Recorded Investment, Pass	42,766	40,455
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	42,766	40,455
Commercial Real Estate Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	162,474	163,449
Financing Receivable, Recorded Investment, Special Mention	1,107	1,208
Financing Receivable Recorded Investment, Substandard Accruing	22	371
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 [Line Items]
Financing Receivable, Recorded Investment, Pass	265,065	259,846
Financing Receivable, Recorded Investment, Special Mention	2,179	1,362
Financing Receivable Recorded Investment, Substandard Accruing	102	688
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 [Line Items]
Financing Receivable, Recorded Investment, Pass	43,909	50,903
Financing Receivable, Recorded Investment, Special Mention	1,375	1,374
Financing Receivable Recorded Investment, Substandard Accruing	2,890	3,768
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 [Line Items]
Financing Receivable, Recorded Investment, Pass	46,136	45,463
Financing Receivable, Recorded Investment, Special Mention	161	173
Financing Receivable Recorded Investment, Substandard Accruing	570	738
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 [Line Items]
Financing Receivable, Recorded Investment, Pass	90,045	96,366
Financing Receivable, Recorded Investment, Special Mention	1,536	1,547
Financing Receivable Recorded Investment, Substandard Accruing	3,460	4,506
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 [Line Items]
Financing Receivable, Recorded Investment, Pass	9,016	9,149
Financing Receivable, Recorded Investment, Special Mention	87	75
Financing Receivable Recorded Investment, Substandard Accruing	45	71
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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