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Allowance for Loan Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	$ 4,790	$ 4,757
Financing Receivable, Allowance for Credit Losses, Charge-offs	(408)	(168)
Financing Receivable, Allowance for Credit Losses, Recoveries	254	201
Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries	(154)	33
Provision for loan losses	(250)	0
Financing Receivable, Allowance for Credit Losses	4,386	4,790
Commercial and Industrial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	778	653
Financing Receivable, Allowance for Credit Losses, Charge-offs	(364)	(52)
Financing Receivable, Allowance for Credit Losses, Recoveries	117	70
Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries	(247)	18
Provision for loan losses	46	107
Financing Receivable, Allowance for Credit Losses	577	778
Construction And Land Development Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	700	734
Financing Receivable, Allowance for Credit Losses, Charge-offs	0	0
Financing Receivable, Allowance for Credit Losses, Recoveries	0	0
Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries	0	0
Provision for loan losses	(131)	(34)
Financing Receivable, Allowance for Credit Losses	569	700
Commercial Real Estate Loans, Total [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	2,218	2,126
Financing Receivable, Allowance for Credit Losses, Charge-offs	0	(38)
Financing Receivable, Allowance for Credit Losses, Recoveries	1	19
Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries	1	(19)
Provision for loan losses	70	111
Financing Receivable, Allowance for Credit Losses	2,289	2,218
Residential Real Estate Loans, Total [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	946	1,071
Financing Receivable, Allowance for Credit Losses, Charge-offs	(6)	(26)
Financing Receivable, Allowance for Credit Losses, Recoveries	109	79
Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries	103	53
Provision for loan losses	(236)	(178)
Financing Receivable, Allowance for Credit Losses	813	946
Consumer Installment and Revolving Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	148	173
Financing Receivable, Allowance for Credit Losses, Charge-offs	(38)	(52)
Financing Receivable, Allowance for Credit Losses, Recoveries	27	33
Financing Receivable Allowance For Credit Losses Net Chargeoffs Recoveries	(11)	(19)
Provision for loan losses	1	(6)
Financing Receivable, Allowance for Credit Losses	$ 138	$ 148

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Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Amount of recovery of financing receivables doubtful of collection that were previously charged off.

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Amount of writeoff of financing receivable, charged against allowance for credit loss.

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Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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