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	Sep. 30, 2023	Dec. 31, 2022
Financial assets:
Cash and cash equivalents (Level 1)	$ 67,979	$ 30,011
Certificates of deposit with other banks	249	5,623
Securities held to maturity (Level 2)	37,778	31,822
Held-to-maturity, fair value	34,588	30,080
Loans (Level 3)	968,948	923,205
Financial liabilities:
Other borrowings (Level 3)	15,000	20,938
Subordinated Notes (Level 3)	40,354	40,484
Carrying Amount [Member] \| Fair Value, Inputs, Level 1 [Member]
Financial assets:
Cash and cash equivalents (Level 1)	67,979	30,011
Accrued interest receivable (Level 1)	4,767	4,661
Restricted investments in bank stock (Level 1)	3,107	3,377
Cash surrender value of life insurance (Level 1)	24,732	19,244
Financial liabilities:
Non-maturity deposits (Level 1)	742,411	675,299
Accrued interest payable (Level 1)	1,166	797
Carrying Amount [Member] \| Fair Value, Inputs, Level 2 [Member]
Financial assets:
Securities held to maturity (Level 2)	37,778	31,822
Carrying Amount [Member] \| Fair Value, Inputs, Level 3 [Member]
Financial assets:
Certificates of deposit with other banks	249	5,623
Loans (Level 3)	978,912	927,871
Derivative (Level 3)	3,264
Financial liabilities:
Time Deposits (Level 3)	299,361	271,473
Other borrowings (Level 3)	15,000	20,938
Subordinated Notes (Level 3)	40,354	40,484
Fair Value [Member] \| Fair Value, Inputs, Level 1 [Member]
Financial assets:
Cash and cash equivalents (Level 1)	67,979	30,011
Accrued interest receivable (Level 1)	4,767	4,661
Restricted investments in bank stock (Level 1)	3,107	3,377
Cash surrender value of life insurance (Level 1)	24,732	19,244
Financial liabilities:
Non-maturity deposits (Level 1)	742,411	675,299
Accrued interest payable (Level 1)	1,166	797
Fair Value [Member] \| Fair Value, Inputs, Level 2 [Member]
Financial assets:
Securities held to maturity (Level 2)	34,588	30,080
Fair Value [Member] \| Fair Value, Inputs, Level 3 [Member]
Financial assets:
Certificates of deposit with other banks	249	5,590
Loans (Level 3)	920,526	886,944
Derivative (Level 3)	3,264
Financial liabilities:
Time Deposits (Level 3)	296,799	266,775
Other borrowings (Level 3)	15,000	20,938
Subordinated Notes (Level 3)	$ 35,796	$ 35,966

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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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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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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The carrying amount as of the balance sheet date for the aggregate of other miscellaneous borrowings owed by the reporting entity.

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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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