Note P - Fair Value Measurements and Disclosures - Carrying Value and Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Cash and due from banks	$ 22,794	$ 32,836
Available for sale securities, fair value	339,477	350,168
Held to maturity securities	150,941	195,217
Held to maturity securities, fair value	138,523	180,050
Other investments	350	350
Federal Home Loan Bank stock	2,334	2,175
Loans, net	221,896	223,494
Cash surrender value of life insurance	21,375	20,768
Intangible asset	538	600
Non-interest bearing	174,933	198,097
Interest bearing	424,398	458,433
Time deposits	28,939	39,517
Borrowings from Federal Home Loan Bank	0	0
Fair Value, Inputs, Level 1 [Member]
Cash and due from banks	22,794	32,836
Available for sale securities, fair value	0	0
Held to maturity securities, fair value	0	0
Other investments	350	350
Federal Home Loan Bank stock	0	0
Loans, net	0	0
Cash surrender value of life insurance	0	0
Intangible asset	0	0
Non-interest bearing	174,933	198,097
Interest bearing	0	0
Time deposits	0	0
Borrowings from Federal Home Loan Bank	0	0
Fair Value, Inputs, Level 2 [Member]
Cash and due from banks	0	0
Available for sale securities, fair value	339,477	350,168
Held to maturity securities, fair value	138,523	180,050
Other investments	0	0
Federal Home Loan Bank stock	2,334	2,175
Loans, net	0	0
Cash surrender value of life insurance	21,375	20,768
Intangible asset	0	0
Non-interest bearing	0	0
Interest bearing	0	0
Time deposits	0	0
Borrowings from Federal Home Loan Bank	18,500	0
Fair Value, Inputs, Level 3 [Member]
Cash and due from banks	0	0
Available for sale securities, fair value	0	0
Held to maturity securities, fair value	0	0
Other investments	0	0
Federal Home Loan Bank stock	0	0
Loans, net	221,896	223,494
Cash surrender value of life insurance	0	0
Intangible asset	538	600
Non-interest bearing	0	0
Interest bearing	424,398	458,433
Time deposits	28,939	39,517
Borrowings from Federal Home Loan Bank	0	0
Reported Value Measurement [Member]
Cash and due from banks	22,794	32,836
Available for sale securities, fair value	339,477	350,168
Held to maturity securities	150,911	195,217
Other investments	350	350
Federal Home Loan Bank stock	2,334	2,175
Loans, net	235,115	234,540
Cash surrender value of life insurance	21,375	20,768
Intangible asset	538	600
Non-interest bearing	174,933	198,097
Interest bearing	483,662	546,565
Time deposits	29,895	41,118
Borrowings from Federal Home Loan Bank	$ 18,500	$ 0

Fair value portion of interest bearing deposits.

No definition available.

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- Definition

Fair value portion of non-interest bearing deposits.

+ References

No definition available.

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- Definition

Fair value portion of investments other than securities.

+ References

No definition available.

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- Definition

Fair value portion of time deposits.

+ References

No definition available.

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- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
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-Publisher FASB
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
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-URI https://asc.fasb.org//1943274/2147479130/326-30-45-1

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- Definition

For banks and other depository institutions: Includes cash on hand (currency and coin), cash items in process of collection, noninterest bearing deposits due from other financial institutions (including corporate credit unions), and noninterest bearing balances with the Federal Reserve Banks, Federal Home Loan Banks and central banks.

+ References

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- Definition

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).

+ References

No definition available.

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- Definition

Fair value portion of borrowing from Federal Home Loan Bank (FHLBank).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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- Definition

Fair value portion of assets, excluding financial assets, that lack physical substance, having a limited useful life.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
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-Publisher FASB
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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
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- Definition

Fair value portion of investments in Federal Home Loan Bank (FHLBank) stock.

+ References

No definition available.

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- Definition

Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-URI https://asc.fasb.org//310-10/tableOfContent

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