Note I - Stockholders' Equity (Details Textual) - USD ($) $ in Millions				12 Months Ended
Jan. 14, 2022	Mar. 12, 2021	Sep. 18, 2020	Jun. 30, 2023
Stock Repurchase Program, Additional Authorized Amount	$ 3	$ 3	$ 2
Stock Repurchase Program, Authorized Amount	$ 18	$ 15	$ 12
Restricted Stock [Member]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount				$ 2
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)				2 years 1 month 6 days

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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