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Loan Credit Quality Analysis (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	$ 463,547	$ 466,410
Financing Receivable, Recorded Investment, Special Mention	3,976	4,361
Financing Receivable Recorded Investment, Substandard Accruing	5,481	6,528
Financing Receivable, Recorded Investment, Nonaccrual Status	169	178
Loans and Leases Receivable, Gross, Carrying Amount	473,173	477,477	$ 444,313
Commercial and Industrial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	49,507	61,568
Financing Receivable, Recorded Investment, Special Mention	821	1,377
Financing Receivable Recorded Investment, Substandard Accruing	570	522
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	50,898	63,467	57,877
Construction And Land Development Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	44,212	39,481
Financing Receivable, Recorded Investment, Special Mention	0	0
Financing Receivable Recorded Investment, Substandard Accruing	719	741
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	44,931	40,222	35,910
Commercial Real Estate Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	60,913	55,942
Financing Receivable, Recorded Investment, Special Mention	152	154
Financing Receivable Recorded Investment, Substandard Accruing	314	317
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	61,379	56,413
Commercial Real Estate Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	40,110	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	40,110	40,455
Commercial Real Estate Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	162,484	163,449
Financing Receivable, Recorded Investment, Special Mention	1,152	1,208
Financing Receivable Recorded Investment, Substandard Accruing	24	371
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	163,660	165,028
Commercial Real Estate Loans, Total [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	263,507	259,846
Financing Receivable, Recorded Investment, Special Mention	1,304	1,362
Financing Receivable Recorded Investment, Substandard Accruing	338	688
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	265,149	261,896	234,345
Residential Real Estate Consumer Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	50,300	50,903
Financing Receivable, Recorded Investment, Special Mention	1,612	1,374
Financing Receivable Recorded Investment, Substandard Accruing	3,034	3,768
Financing Receivable, Recorded Investment, Nonaccrual Status	169	178
Loans and Leases Receivable, Gross, Carrying Amount	55,115	56,223
Residential Real Estate Investment Property Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	47,657	45,463
Financing Receivable, Recorded Investment, Special Mention	169	173
Financing Receivable Recorded Investment, Substandard Accruing	690	738
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	48,516	46,374
Residential Real Estate Loans, Total [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	97,957	96,366
Financing Receivable, Recorded Investment, Special Mention	1,781	1,547
Financing Receivable Recorded Investment, Substandard Accruing	3,724	4,506
Financing Receivable, Recorded Investment, Nonaccrual Status	169	178
Loans and Leases Receivable, Gross, Carrying Amount	103,631	102,597	106,496
Consumer Installment and Revolving Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	8,364	9,149
Financing Receivable, Recorded Investment, Special Mention	70	75
Financing Receivable Recorded Investment, Substandard Accruing	130	71
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	$ 8,564	$ 9,295	$ 9,685

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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