Fair Value Measurements - Summary of Estimated Fair Value of Financial Instruments that are not Required to be Measured or Reported at Fair Value (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financial assets:
Cash and cash equivalents (Level 1)	$ 22,590	$ 33,162	$ 27,708
Certificates of deposit with other banks (Level 3)	12,828	17,051
Loans (Level 3)	711,664	233,795
Financial liabilities:
Time Deposits (Level 3)	180,321
Long-term borrowings (Level 3)	40,510
Subordinated Notes (Level 3)	20,696	0
Carrying Amount [Member] \| Fair Value, Inputs, Level 1 [Member]
Financial assets:
Cash and cash equivalents (Level 1)	22,590	33,162
Accrued interest receivable (Level 1)	3,022	1,675
Restricted investments in bank stock (Level 1)	2,685	2,268
Cash surrender value of life insurance (Level 1)	18,787	8,941
Financial liabilities:
Non-maturity deposits (Level 1)	591,344	294,469
Accrued interest payable (Level 1)	103	233
Carrying Amount [Member] \| Fair Value, Inputs, Level 3 [Member]
Financial assets:
Certificates of deposit with other banks (Level 3)	12,828	17,051
Loans (Level 3)	711,664	233,795
Financial liabilities:
Time Deposits (Level 3)	180,321	80,655
Long-term borrowings (Level 3)	19,814	1,120
Subordinated Notes (Level 3)	20,696	0
Fair Value [Member] \| Fair Value, Inputs, Level 1 [Member]
Financial assets:
Cash and cash equivalents (Level 1)	22,590	33,162
Accrued interest receivable (Level 1)	3,022	1,675
Restricted investments in bank stock (Level 1)	2,685	2,268
Cash surrender value of life insurance (Level 1)	18,787	8,941
Financial liabilities:
Non-maturity deposits (Level 1)	591,344	294,469
Accrued interest payable (Level 1)	103	233
Fair Value [Member] \| Fair Value, Inputs, Level 3 [Member]
Financial assets:
Certificates of deposit with other banks (Level 3)	12,828	17,051
Loans (Level 3)	705,706	236,030
Financial liabilities:
Time Deposits (Level 3)	180,485	81,164
Long-term borrowings (Level 3)	19,819	1,116
Subordinated Notes (Level 3)	$ 20,696	$ 0

Accrued interest payable.

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Accrued interest receivable fair value disclosure.

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Non maturity deposits.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Fair value portion of the amount that could be realized under a life insurance contract or contracts owned by the entity, commonly known as corporate-owned life insurance (COLI) or bank-owned life insurance (BOLI).

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Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity.

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A savings certificate entitling the Entity (that is, bearer) to receive interest at an established maturity date, based upon a fixed interest rate. A certificate of deposit may be issued in any denomination. Certificates of deposit are generally issued by commercial banks and, therefore, insured by the FDIC (up to the prescribed limit). Certificates of deposit generally restrict holders from withdrawing funds on demand without the incurrence of penalties. Generally, only certificates of deposit with original maturities of three months or less qualify as cash equivalents. Original maturity means original maturity to the entity holding the investment. As a related example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The aggregate value of all restricted investments.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

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Amount of time deposit liabilities, including certificates of deposit.

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