Note 2 - Fair Value Measurements (Details Textual) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Sep. 15, 2022
Class of Warrant or Right, Term Of Contract (Year)	4 years	4 years
The 2022 Note [Member] \| Convertible Debt [Member]
Debt Instrument, Face Amount			$ 10.5

Face (par) amount of debt instrument at time of issuance.

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