Loans - Narrative (Details)	12 Months Ended
Dec. 31, 2020 USD ($) loan	Dec. 31, 2019 USD ($) loan
Loans and Leases Receivable Disclosure [Line Items]
Minimum loan balance to review high risk loans	$ 250,000
Interest income on impaired loans	761,000	$ 175,000
Interest lost on nonaccrual loans	$ 518,000	$ 221,000
Number of loan contracts restructured \| loan	4	0
Loan contracts restructured	$ 494,000
Number of loan contracts with subsequent default \| loan		1
Loan contracts that subsequently defaulted		$ 859,000
Loans	1,059,503,000	968,814,000
Loan Modifications, CARES Act
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 1,900,000
Commercial Loan
Loans and Leases Receivable Disclosure [Line Items]
Number of loan contracts restructured \| loan	1
Loan contracts restructured	$ 89,000
Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Number of loan contracts restructured \| loan	2
Loan contracts restructured	$ 132,000
Loans	$ 641,484,000	636,336,000
Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Number of loan contracts restructured \| loan	1
Loan contracts restructured	$ 273,000
Loans	$ 183,021,000	$ 194,796,000

Minimum loan balance for reviewing.

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Number of financing receivables that have been modified by troubled debt restructurings.

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Amount of financing receivable modified as troubled debt restructuring.

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Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

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Reflects the amount of additional interest income that would have been recorded if impaired or nonperforming loans were instead current, in compliance with their original terms, and outstanding throughout the reporting period or since origination (if held for part of the period).

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Amount, before allowance for credit loss, of financing receivable.

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