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Loans and Allowance for Loan and Lease Losses - Additional Information (Details) $ in Thousands | 12 Months Ended |
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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% |

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