Note F - Long-term Debt - Long-term Debt (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
New Credit Facility [Member] \| Revolving Credit Facility [Member]
Total debt	$ 10	$ 5

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant