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Note G - Treasury Stock (Details Textual) - USD ($)	May 01, 2025	Apr. 11, 2025	Apr. 03, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Jul. 31, 2023
Treasury Stock, Common, Value				$ 28,924,000		$ 13,996,000
Treasury Stock, Common, Shares (in shares)				1,451,586		581,586
September 2011 Reauthorization [Member]
Share Repurchase Program, Authorized, Number of Shares (in shares)							500,000
Share Repurchase Program, Remaining Authorized, Number of Shares (in shares)					474,016
Shares Repurchase Tender Offer [Member]
Share Repurchase Program, Authorized, Number of Shares (in shares)	870,000		435,000
Treasury Stock, Authorized to Repurchase, Purchase Price (in dollars per share)	$ 17
Treasury Stock, Common, Value	$ 14,800,000
Treasury Stock, Authorized to Repurchase, Percentage of Outstanding Shares	2.00%
Shares Repurchase Tender Offer [Member] | Maximum [Member]
Treasury Stock, Authorized to Repurchase, Purchase Price (in dollars per share)			$ 17
Shares Repurchase Tender Offer [Member] | Minimum [Member]
Treasury Stock, Authorized to Repurchase, Purchase Price (in dollars per share)		$ 14.5	$ 14

X

- Definition

The number of treasury stock shares authorized to be repurchased expressed as a percentage of total shares outstanding.

+ References

No definition available.

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X

- Definition

Purchase price for treasury stock authorized to repurchase.

+ References

No definition available.

+ Details

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X

- Definition

Number of shares authorized to be purchased under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481520/505-30-50-4

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X

- Definition

Number of shares remaining authorized to be purchased under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

No definition available.

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X

- Definition

Number of previously issued common shares repurchased by the issuing entity and held in treasury.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481549/505-30-45-1

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X

- Definition

Amount allocated to previously issued common shares repurchased by the issuing entity and held in treasury.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(30))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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-Topic 505
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481520/505-30-50-4

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-Topic 505
-SubTopic 30
-Section 45
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481549/505-30-45-1

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