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Interest income recorded.

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Number of loans originated and funded.

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Number of loans to small business.

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Loans and Allowance for Loan and Lease Losses - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) Loan	Dec. 31, 2021 USD ($) Loan	Dec. 31, 2021 USD ($) Loan	Dec. 31, 2021 USD ($) Loan	Dec. 31, 2021 USD ($) Loan DebtSecurityNumber	Dec. 31, 2021 USD ($) Loan Contract	Dec. 31, 2020 USD ($) Loan	Dec. 31, 2020 USD ($) Loan	Dec. 31, 2020 USD ($) Loan	Dec. 31, 2020 USD ($) Loan DebtSecurityNumber	Dec. 31, 2020 USD ($) Loan Contract	Dec. 31, 2019 USD ($)
Debt Securities Heldtomaturity Allowance For Credit Loss [Line Items]
Loans Pledged as Collateral	$ 66,600	$ 66,600	$ 66,600	$ 66,600	$ 66,600	$ 66,600	$ 36,100	$ 36,100	$ 36,100	$ 36,100	$ 36,100
Loans and Leases Receivable, Related Parties, Ending Balance		300					400
Loans and Leases Receivable, Related Parties, Additions		0					0
Loans and Leases Receivable, Related Parties, Proceeds		100					500
Loan, aggregate principal balance	10,653	10,653	10,653	10,653	10,653	10,653
Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest	2,000	2,000	2,000	2,000	2,000	2,000	3,100	3,100	3,100	3,100	3,100
Financing Receivable, Troubled Debt Restructuring	100	100	100	100	100	100	100	100	100	100	100
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans		52					161
Interest Income Recorded	30	30	30	$ 30	$ 30	30	42	42	$ 42	$ 42	42
Number of loans				2	7				0	5
Financing Receivable, Restructuring Recorded Investment With Nonaccrual Status	600	600	600	$ 600	$ 600	600
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Cash Flows Expected to be Collected at Acquisition	0	0	0	0	0	$ 0	0	0	$ 0	$ 0	$ 0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts \| Contract						0					0
Loans, allowance for loan losses	8,320	8,320	8,320	8,320	8,320	$ 8,320	7,470	7,470	7,470	7,470	$ 7,470	$ 5,762
Restructured Loan Modified through Extended Maturity and Payment Schedule Modification [Member]
Debt Securities Heldtomaturity Allowance For Credit Loss [Line Items]
Financing Receivable, Restructuring Recorded Investment With Nonaccrual Status	500	500	500	500	500	500
Loans, allowance for loan losses	7	7	7	7	7	7	$ 1	$ 1	$ 1	$ 1	$ 1
Minimum [Member]
Debt Securities Heldtomaturity Allowance For Credit Loss [Line Items]
Loans Modified in a Troubled Debt Restructuring, Individually Evaluated for Impairment, Principal Balance, Threshold	500	500	500	500	500	500
Minimum [Member] \| ALC [Member]
Debt Securities Heldtomaturity Allowance For Credit Loss [Line Items]
Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest	$ 50	$ 50	$ 50	$ 50	$ 50	$ 50
Paycheck Protection Program [Member]
Debt Securities Heldtomaturity Allowance For Credit Loss [Line Items]
Loan, fixed interest rate	1.00%	1.00%	1.00%	1.00%	1.00%	1.00%
Number of loans originated and funded \| Loan	267	267	267	267	267	267	267	267	267	267	267
Loans, aggregate balance at origination	$ 20,400	$ 20,400	$ 20,400	$ 20,400	$ 20,400	$ 20,400	$ 20,400	$ 20,400	$ 20,400	$ 20,400	$ 20,400
Number of loans to small businesses \| Loan	37	37	37	37	37	37
Loan, aggregate principal balance	$ 1,700	$ 1,700	$ 1,700	$ 1,700	$ 1,700	$ 1,700
Loan payment term	five-year
Amortized loan fees		504					161
Net deferred loan fee		$ 83
Paycheck Protection Program [Member] \| Minimum [Member]
Debt Securities Heldtomaturity Allowance For Credit Loss [Line Items]
Loan fee percentage	1.00%	1.00%	1.00%	1.00%	1.00%	1.00%
Paycheck Protection Program [Member] \| Maximum [Member]
Debt Securities Heldtomaturity Allowance For Credit Loss [Line Items]
Loan fee percentage	5.00%	5.00%	5.00%	5.00%	5.00%	5.00%
Financial Asset Acquired With Credit Deterioration [Member]
Debt Securities Heldtomaturity Allowance For Credit Loss [Line Items]
Amount Of Deferment Loan	$ 400	$ 400	$ 400	$ 400	$ 400	$ 400	8,100	$ 8,100	$ 8,100	$ 8,100	$ 8,100
Deferred principal balance of loan reduced		$ 11,400					$ 13,500
Deferred principal balance of loan reduced percentage			1.30%					2.10%
Real Estate [Member]
Debt Securities Heldtomaturity Allowance For Credit Loss [Line Items]
Percentage of Loan Portfolio	54.00%	54.00%	54.00%	54.00%	54.00%	54.00%	56.10%	56.10%	56.10%	56.10%	56.10%