Note 4 - Fair Value Measurement (Details Textual) - USD ($) $ in Billions	Jun. 30, 2024	Dec. 31, 2023
Long-Term Debt	$ 6.1	$ 6.2
Long-Term Debt, Fair Value	$ 5.1	$ 5.6

Amount, after deduction of 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