Note J - Treasury Stock (Details Textual)	Mar. 31, 2026 USD ($)
Stock Repurchase Program, Authorized Amount	$ 18,000,000
Share Repurchase Program, Remaining Authorized, Amount	$ 716,000

Amount remaining authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

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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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant