Note P - Fair Value Measurements and Disclosures - Carrying Value and Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Cash and due from banks	$ 29,424	$ 17,191
Available for sale securities	196,311	222,110
Held to maturity securities	52,231	54,598
Held to maturity securities	53,130	53,459
Other investments	2,643	2,811
Federal Home Loan Bank stock	2,129	2,069
Loans, net	261,710	260,560
Other real estate	7,453	8,943
Cash surrender value of life insurance	19,381	18,841
Non-interest bearing	122,592	114,512
Interest bearing	354,141	359,386
Borrowings from Federal Home Loan Bank	3,730	36,211
Fair Value, Inputs, Level 1 [Member]
Cash and due from banks	29,424	17,191
Available for sale securities
Held to maturity securities
Other investments	2,643	2,811
Federal Home Loan Bank stock
Loans, net
Other real estate
Cash surrender value of life insurance
Non-interest bearing	122,592	114,512
Interest bearing
Borrowings from Federal Home Loan Bank
Fair Value, Inputs, Level 2 [Member]
Cash and due from banks
Available for sale securities	196,311	222,110
Held to maturity securities	53,130	53,459
Other investments
Federal Home Loan Bank stock	2,129	2,069
Loans, net
Other real estate
Cash surrender value of life insurance	19,381	18,841
Non-interest bearing
Interest bearing
Borrowings from Federal Home Loan Bank	3,730	36,211
Fair Value, Inputs, Level 3 [Member]
Cash and due from banks
Available for sale securities
Held to maturity securities
Other investments
Federal Home Loan Bank stock
Loans, net	261,710	260,560
Other real estate	7,453	8,943
Cash surrender value of life insurance
Non-interest bearing
Interest bearing	354,141	359,386
Borrowings from Federal Home Loan Bank
Reported Value Measurement [Member]
Cash and due from banks	29,424	17,191
Available for sale securities	196,311	222,110
Held to maturity securities	52,231	54,598
Other investments	2,643	2,811
Federal Home Loan Bank stock	2,129	2,069
Loans, net	264,742	268,006
Other real estate	7,453	8,943
Cash surrender value of life insurance	19,381	18,841
Non-interest bearing	122,592	114,512
Interest bearing	353,551	358,994
Borrowings from Federal Home Loan Bank	$ 3,526	$ 36,142

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.

+ Details

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- Definition

Fair value portion of investments other than securities.

+ References

No definition available.

+ Details

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- Definition

Fair value portion of real estate acquired through foreclosure.

+ 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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118942338&loc=SL82898722-210454

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26610-111562

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563

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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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(1))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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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.

+ Details

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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.13(3)(a))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26610-111562

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-Paragraph 5
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27232-111563

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27232-111563

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- Definition

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

+ References

No definition available.

+ Details

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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2196772

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